./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs --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 b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:20:21,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:20:21,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:20:21,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:20:21,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:20:21,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:20:21,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:20:21,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:20:21,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:20:21,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:20:21,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:20:21,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:20:21,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:20:21,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:20:21,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:20:21,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:20:21,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:20:21,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:20:21,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:20:21,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:20:21,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:20:22,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:20:22,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:20:22,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:20:22,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:20:22,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:20:22,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:20:22,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:20:22,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:20:22,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:20:22,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:20:22,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:20:22,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:20:22,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:20:22,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:20:22,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:20:22,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:20:22,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:20:22,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:20:22,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:20:22,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:20:22,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:20:22,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:20:22,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:20:22,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:20:22,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:20:22,088 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:20:22,088 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:20:22,088 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:20:22,088 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:20:22,095 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:20:22,095 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:20:22,096 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:20:22,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:20:22,097 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:20:22,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:20:22,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:20:22,098 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:20:22,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:20:22,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:20:22,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:20:22,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:20:22,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:20:22,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:20:22,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:20:22,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:20:22,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:20:22,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:20:22,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:20:22,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:20:22,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:20:22,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:20:22,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:20:22,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:22,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:20:22,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:20:22,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:20:22,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:20:22,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:20:22,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:20:22,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:20:22,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:20:22,105 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_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 [2021-11-19 13:20:22,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:20:22,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:20:22,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:20:22,479 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:20:22,479 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:20:22,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-19 13:20:22,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/data/e5cb69c97/61fc163919814960a790607d62a8a720/FLAGb7a228b57 [2021-11-19 13:20:23,113 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:20:23,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-19 13:20:23,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/data/e5cb69c97/61fc163919814960a790607d62a8a720/FLAGb7a228b57 [2021-11-19 13:20:23,479 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/data/e5cb69c97/61fc163919814960a790607d62a8a720 [2021-11-19 13:20:23,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:20:23,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:20:23,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:23,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:20:23,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:20:23,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e38a80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23, skipping insertion in model container [2021-11-19 13:20:23,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:20:23,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:20:23,714 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-19 13:20:23,737 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:23,745 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:20:23,760 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-19 13:20:23,783 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:23,797 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:20:23,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23 WrapperNode [2021-11-19 13:20:23,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:23,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:23,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:20:23,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:20:23,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,841 INFO L137 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-19 13:20:23,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:23,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:20:23,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:20:23,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:20:23,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:20:23,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:20:23,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:20:23,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:20:23,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (1/1) ... [2021-11-19 13:20:23,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:23,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:23,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:20:23,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:20:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:20:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:20:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:20:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 13:20:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:20:23,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:20:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 13:20:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:20:24,050 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:20:24,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:20:24,244 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:20:24,289 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:20:24,289 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 13:20:24,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:24 BoogieIcfgContainer [2021-11-19 13:20:24,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:20:24,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:20:24,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:20:24,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:20:24,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:20:23" (1/3) ... [2021-11-19 13:20:24,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651dfa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:24, skipping insertion in model container [2021-11-19 13:20:24,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:23" (2/3) ... [2021-11-19 13:20:24,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651dfa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:24, skipping insertion in model container [2021-11-19 13:20:24,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:24" (3/3) ... [2021-11-19 13:20:24,303 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2021-11-19 13:20:24,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:20:24,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:20:24,369 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:20:24,378 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 [2021-11-19 13:20:24,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:20:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) [2021-11-19 13:20:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 13:20:24,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:24,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 13:20:24,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1597235250, now seen corresponding path program 1 times [2021-11-19 13:20:24,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:24,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157281283] [2021-11-19 13:20:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:24,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:24,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157281283] [2021-11-19 13:20:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157281283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:24,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:24,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:20:24,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564273690] [2021-11-19 13:20:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:24,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:20:24,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:20:24,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:20:24,745 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:24,783 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-19 13:20:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:20:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-19 13:20:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:24,793 INFO L225 Difference]: With dead ends: 17 [2021-11-19 13:20:24,794 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 13:20:24,797 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 [2021-11-19 13:20:24,812 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:24,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:20:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 13:20:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 13:20:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-11-19 13:20:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-19 13:20:24,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-11-19 13:20:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:24,856 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-19 13:20:24,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-19 13:20:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 13:20:24,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:24,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:24,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:20:24,858 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1770300940, now seen corresponding path program 1 times [2021-11-19 13:20:24,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:24,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113625961] [2021-11-19 13:20:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:24,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:24,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:24,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113625961] [2021-11-19 13:20:24,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113625961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:24,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141188170] [2021-11-19 13:20:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:24,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:24,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:24,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:20:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:25,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:20:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:25,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:25,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141188170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:25,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122659155] [2021-11-19 13:20:25,273 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:20:25,280 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:20:25,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:20:25,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:20:25,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:20:25,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,348 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:25,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:25,362 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:25,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,372 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:25,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:20:25,404 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_10|], 39=[|v_#valid_26|]} [2021-11-19 13:20:25,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:20:25,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:25,480 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:25,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:25,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:25,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,683 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:20:25,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:20:25,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:25,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:25,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:25,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:25,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:20:25,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:25,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:20:25,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,782 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:25,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:25,796 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.3 percent of original size 172 [2021-11-19 13:20:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:25,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-19 13:20:25,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:25,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:25,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:25,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:25,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:25,849 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-11-19 13:20:25,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-19 13:20:25,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:25,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:173, output treesize:157 [2021-11-19 13:20:25,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:25,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:25,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:26,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,099 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:26,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-19 13:20:26,104 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:26,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:26,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 13:20:26,115 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:26,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-19 13:20:26,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 406 [2021-11-19 13:20:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:26,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:26,191 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:26,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:26,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2021-11-19 13:20:26,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:26,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:26,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:26,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,317 INFO L180 QuantifierPusher]: treesize reduction 88, result has 81.1 percent of original size [2021-11-19 13:20:26,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 377 [2021-11-19 13:20:26,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:20:26,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:501, output treesize:377 [2021-11-19 13:20:26,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,429 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:20:26,431 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:26,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:26,434 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:20:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:26,464 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:20:26,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:20:26,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:26,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,474 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:26,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:26,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:26,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:20:26,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:26,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:20:26,495 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:26,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:26,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:26,506 INFO L185 QuantifierPusher]: treesize reduction 37, result has 2.6 percent of original size 1 [2021-11-19 13:20:26,508 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:20:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2122659155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:26,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:20:26,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2021-11-19 13:20:26,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50068061] [2021-11-19 13:20:26,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:26,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:20:26,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:20:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:20:26,602 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:26,651 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-19 13:20:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:20:26,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-19 13:20:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:26,653 INFO L225 Difference]: With dead ends: 15 [2021-11-19 13:20:26,656 INFO L226 Difference]: Without dead ends: 10 [2021-11-19 13:20:26,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:20:26,658 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:26,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:20:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-19 13:20:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-19 13:20:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2021-11-19 13:20:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-19 13:20:26,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-19 13:20:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:26,663 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-19 13:20:26,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-19 13:20:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 13:20:26,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:26,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:26,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:26,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:26,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash -957214816, now seen corresponding path program 1 times [2021-11-19 13:20:26,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:26,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301769328] [2021-11-19 13:20:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:26,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:26,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:26,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301769328] [2021-11-19 13:20:26,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301769328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:26,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809796674] [2021-11-19 13:20:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:26,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:26,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:26,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 13:20:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:20:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:27,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:27,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809796674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:27,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624157201] [2021-11-19 13:20:27,098 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:20:27,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:20:27,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:20:27,109 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:20:27,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:20:27,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,132 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:27,135 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:27,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:20:27,161 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_11|], 39=[|v_#valid_27|]} [2021-11-19 13:20:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:20:27,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:27,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:27,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,301 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:20:27,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:20:27,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:27,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,313 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:27,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:20:27,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:20:27,336 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,343 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:27,351 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.3 percent of original size 172 [2021-11-19 13:20:27,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-19 13:20:27,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:27,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:27,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,392 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-11-19 13:20:27,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-19 13:20:27,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:173, output treesize:157 [2021-11-19 13:20:27,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,499 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,515 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,523 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-19 13:20:27,527 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:27,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 13:20:27,535 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-19 13:20:27,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 406 [2021-11-19 13:20:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:27,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:27,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:27,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:27,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2021-11-19 13:20:27,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:27,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:27,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,716 INFO L180 QuantifierPusher]: treesize reduction 88, result has 81.1 percent of original size [2021-11-19 13:20:27,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 377 [2021-11-19 13:20:27,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:20:27,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:501, output treesize:377 [2021-11-19 13:20:27,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,808 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:20:27,811 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:27,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:20:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:27,834 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:20:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:20:27,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:27,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:27,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:20:27,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:20:27,855 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:27,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:27,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,862 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-19 13:20:27,866 INFO L185 QuantifierPusher]: treesize reduction 3, result has 94.9 percent of original size 56 [2021-11-19 13:20:27,912 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-19 13:20:27,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-19 13:20:27,914 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,918 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:27,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 13:20:27,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 13:20:27,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 13:20:27,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:27,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:27,945 INFO L180 QuantifierPusher]: treesize reduction 7, result has 94.2 percent of original size [2021-11-19 13:20:27,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-19 13:20:27,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:27,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:114 [2021-11-19 13:20:27,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:27,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:28,002 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.9 percent of original size [2021-11-19 13:20:28,006 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:28,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:28,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-19 13:20:28,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:28,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:28,057 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:28,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:28,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,063 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:28,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:28,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:28,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:28,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:28,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:28,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,091 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-11-19 13:20:28,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:28,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:170 [2021-11-19 13:20:28,097 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:28,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:28,105 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:20:28,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:20:28,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:20:28,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-19 13:20:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683670237] [2021-11-19 13:20:28,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:20:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:20:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:20:28,370 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:28,406 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-19 13:20:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:20:28,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 13:20:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:28,407 INFO L225 Difference]: With dead ends: 20 [2021-11-19 13:20:28,407 INFO L226 Difference]: Without dead ends: 13 [2021-11-19 13:20:28,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:20:28,409 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:28,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:20:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-19 13:20:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-19 13:20:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-19 13:20:28,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-19 13:20:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:28,414 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-19 13:20:28,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-19 13:20:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 13:20:28,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:28,415 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:28,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:28,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 13:20:28,616 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1834950302, now seen corresponding path program 2 times [2021-11-19 13:20:28,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:28,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381073175] [2021-11-19 13:20:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:28,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:28,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:28,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381073175] [2021-11-19 13:20:28,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381073175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:28,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384386948] [2021-11-19 13:20:28,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:20:28,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:28,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:28,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 13:20:28,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 13:20:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:20:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:20:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:20:28,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:20:28,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384386948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:28,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640214797] [2021-11-19 13:20:28,938 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:20:28,938 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:20:28,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:20:28,939 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:20:28,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:20:28,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,960 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:28,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:28,962 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:28,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:28,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:28,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:20:28,969 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_12|], 39=[|v_#valid_28|]} [2021-11-19 13:20:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:20:29,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:29,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:29,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,079 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:20:29,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:20:29,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:29,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:29,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,117 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:20:29,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,118 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:20:29,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,126 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:29,132 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.3 percent of original size 172 [2021-11-19 13:20:29,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-19 13:20:29,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:29,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:29,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,161 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-11-19 13:20:29,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-19 13:20:29,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:173, output treesize:157 [2021-11-19 13:20:29,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,248 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,256 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,257 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-19 13:20:29,258 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:29,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 13:20:29,266 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,272 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-19 13:20:29,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 406 [2021-11-19 13:20:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2021-11-19 13:20:29,334 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:29,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:29,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:29,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:29,362 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,362 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:29,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,412 INFO L180 QuantifierPusher]: treesize reduction 88, result has 81.1 percent of original size [2021-11-19 13:20:29,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 377 [2021-11-19 13:20:29,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:20:29,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:501, output treesize:377 [2021-11-19 13:20:29,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,508 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:20:29,509 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:29,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:20:29,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:29,532 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:20:29,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:20:29,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:29,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:29,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:20:29,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:20:29,546 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:29,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:29,550 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,552 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-19 13:20:29,555 INFO L185 QuantifierPusher]: treesize reduction 3, result has 94.9 percent of original size 56 [2021-11-19 13:20:29,596 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-19 13:20:29,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-19 13:20:29,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,604 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-19 13:20:29,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-19 13:20:29,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-19 13:20:29,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:29,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,625 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.9 percent of original size [2021-11-19 13:20:29,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-19 13:20:29,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:118 [2021-11-19 13:20:29,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,662 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.9 percent of original size [2021-11-19 13:20:29,665 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:29,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-19 13:20:29,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:29,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:29,711 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:29,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:29,712 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,716 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,722 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:29,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-19 13:20:29,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-19 13:20:29,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-19 13:20:29,730 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-19 13:20:29,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:29,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:29,746 INFO L628 ElimStorePlain]: treesize reduction 29, result has 84.2 percent of original size [2021-11-19 13:20:29,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:29,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-11-19 13:20:29,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:29,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:155 [2021-11-19 13:20:29,763 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:29,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:29,770 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:20:30,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:20:30,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:20:30,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2021-11-19 13:20:30,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775186704] [2021-11-19 13:20:30,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:30,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:20:30,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:20:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:20:30,044 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:30,203 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-11-19 13:20:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:20:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 13:20:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:30,205 INFO L225 Difference]: With dead ends: 55 [2021-11-19 13:20:30,206 INFO L226 Difference]: Without dead ends: 48 [2021-11-19 13:20:30,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:20:30,207 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:30,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 24 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:20:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-19 13:20:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2021-11-19 13:20:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-19 13:20:30,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2021-11-19 13:20:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:30,216 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-19 13:20:30,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-19 13:20:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 13:20:30,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:30,218 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:30,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:30,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-19 13:20:30,444 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash -572813472, now seen corresponding path program 3 times [2021-11-19 13:20:30,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:30,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945173313] [2021-11-19 13:20:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:30,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:20:30,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:30,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945173313] [2021-11-19 13:20:30,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945173313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:30,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967967328] [2021-11-19 13:20:30,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:20:30,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:30,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:30,608 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:30,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 13:20:30,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:20:30,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:20:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:20:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:20:31,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:20:31,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967967328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:31,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012593093] [2021-11-19 13:20:31,234 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:20:31,234 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:20:31,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:20:31,235 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:20:31,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:20:31,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,243 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:31,245 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:31,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:20:31,253 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_13|], 39=[|v_#valid_29|]} [2021-11-19 13:20:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:20:31,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:31,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:31,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,337 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:20:31,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:20:31,339 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:31,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:31,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:20:31,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:20:31,360 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,362 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:31,367 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.3 percent of original size 172 [2021-11-19 13:20:31,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-19 13:20:31,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:31,382 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:31,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,396 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-11-19 13:20:31,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-19 13:20:31,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:173, output treesize:157 [2021-11-19 13:20:31,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,483 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,490 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,490 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-19 13:20:31,492 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:31,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 13:20:31,497 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-19 13:20:31,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 406 [2021-11-19 13:20:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:31,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:31,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:31,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2021-11-19 13:20:31,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:31,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:20:31,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,626 INFO L180 QuantifierPusher]: treesize reduction 88, result has 81.1 percent of original size [2021-11-19 13:20:31,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 377 [2021-11-19 13:20:31,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:20:31,633 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:501, output treesize:377 [2021-11-19 13:20:31,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,691 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:20:31,698 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:31,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:20:31,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:31,716 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:20:31,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:20:31,717 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:31,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:31,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:20:31,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:20:31,728 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:31,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:31,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,733 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:31,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-11-19 13:20:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:31,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:31,779 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:31,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,783 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:31,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:31,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:31,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:31,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-11-19 13:20:31,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:172 [2021-11-19 13:20:31,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,838 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.9 percent of original size [2021-11-19 13:20:31,847 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:31,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-19 13:20:31,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:31,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:31,889 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:31,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:31,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,892 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,895 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:31,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:31,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:31,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:31,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:31,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:31,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:31,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:31,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-11-19 13:20:31,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:31,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:170 [2021-11-19 13:20:31,917 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:31,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:31,923 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:20:32,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:20:32,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:20:32,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-11-19 13:20:32,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591445130] [2021-11-19 13:20:32,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:32,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 13:20:32,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 13:20:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:20:32,139 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:32,203 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-11-19 13:20:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:20:32,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-19 13:20:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:32,206 INFO L225 Difference]: With dead ends: 44 [2021-11-19 13:20:32,206 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 13:20:32,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:20:32,213 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:32,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:20:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 13:20:32,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-19 13:20:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-19 13:20:32,227 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2021-11-19 13:20:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:32,227 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-19 13:20:32,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-19 13:20:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 13:20:32,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:32,231 INFO L514 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:32,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:32,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-19 13:20:32,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 428208670, now seen corresponding path program 4 times [2021-11-19 13:20:32,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:32,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030014219] [2021-11-19 13:20:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:32,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:20:32,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:32,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030014219] [2021-11-19 13:20:32,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030014219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:32,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65515004] [2021-11-19 13:20:32,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:20:32,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:32,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:32,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 13:20:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:32,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:20:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:20:33,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:20:33,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65515004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:33,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905434126] [2021-11-19 13:20:33,655 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:20:33,655 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:20:33,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:20:33,656 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:20:33,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:20:33,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,669 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:33,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:33,671 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:33,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:33,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:20:33,677 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_14|], 39=[|v_#valid_30|]} [2021-11-19 13:20:33,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:20:33,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:33,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:33,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:33,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:33,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,751 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:20:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:20:33,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:33,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:33,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:33,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:33,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:20:33,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:33,776 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:20:33,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,780 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:33,781 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:33,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-11-19 13:20:33,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:33,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:33,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:33,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:33,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:33,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-19 13:20:33,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:33,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:192, output treesize:174 [2021-11-19 13:20:33,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:33,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:33,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:33,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,877 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:33,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,881 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:33,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:33,883 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:33,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-19 13:20:33,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 408 [2021-11-19 13:20:33,889 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:33,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-11-19 13:20:33,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-19 13:20:33,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:33,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,927 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:33,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:33,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2021-11-19 13:20:33,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-19 13:20:33,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:33,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-19 13:20:33,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:33,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:33,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,002 INFO L180 QuantifierPusher]: treesize reduction 93, result has 80.6 percent of original size [2021-11-19 13:20:34,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 387 [2021-11-19 13:20:34,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:20:34,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:516, output treesize:387 [2021-11-19 13:20:34,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,070 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:20:34,072 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:34,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:34,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:20:34,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:34,090 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:20:34,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:20:34,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,091 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:34,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:34,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:34,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:20:34,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:34,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:20:34,102 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:34,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:34,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,107 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:34,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:34,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-11-19 13:20:34,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:34,152 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:34,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:34,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,156 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:34,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,159 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:34,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-19 13:20:34,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-19 13:20:34,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-19 13:20:34,167 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-11-19 13:20:34,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:34,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-11-19 13:20:34,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:34,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:171 [2021-11-19 13:20:34,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,209 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.9 percent of original size [2021-11-19 13:20:34,210 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:34,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:34,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-19 13:20:34,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:34,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:34,254 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:34,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:34,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,258 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:34,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:34,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:34,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:34,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:34,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:34,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,272 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:34,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-11-19 13:20:34,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:34,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:170 [2021-11-19 13:20:34,278 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:34,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:34,284 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:20:34,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:20:34,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:20:34,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-11-19 13:20:34,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807123090] [2021-11-19 13:20:34,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:34,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 13:20:34,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:34,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 13:20:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 13:20:34,505 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:34,609 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2021-11-19 13:20:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 13:20:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 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 29 [2021-11-19 13:20:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:34,611 INFO L225 Difference]: With dead ends: 62 [2021-11-19 13:20:34,611 INFO L226 Difference]: Without dead ends: 49 [2021-11-19 13:20:34,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 13:20:34,614 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:34,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:20:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-19 13:20:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-19 13:20:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-19 13:20:34,628 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 29 [2021-11-19 13:20:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:34,628 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-19 13:20:34,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-19 13:20:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 13:20:34,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:34,630 INFO L514 BasicCegarLoop]: trace histogram [34, 7, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:34,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:34,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-19 13:20:34,856 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash 200684638, now seen corresponding path program 5 times [2021-11-19 13:20:34,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:34,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920590749] [2021-11-19 13:20:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:34,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:20:35,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:35,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920590749] [2021-11-19 13:20:35,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920590749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:35,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610837686] [2021-11-19 13:20:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:20:35,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:35,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:35,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:35,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 13:20:35,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 13:20:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:20:35,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:20:35,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-19 13:20:36,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-19 13:20:36,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610837686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:36,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741567006] [2021-11-19 13:20:36,443 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:20:36,443 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:20:36,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:20:36,443 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:20:36,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:20:36,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,449 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,450 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:36,451 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:36,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:20:36,456 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_15|], 39=[|v_#valid_31|]} [2021-11-19 13:20:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:20:36,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,480 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:36,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:20:36,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,526 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:20:36,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:20:36,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:36,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:20:36,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:20:36,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:20:36,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,555 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:36,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-11-19 13:20:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:36,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:36,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:36,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-19 13:20:36,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:192, output treesize:174 [2021-11-19 13:20:36,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,660 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,665 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-19 13:20:36,667 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:20:36,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 408 [2021-11-19 13:20:36,673 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-11-19 13:20:36,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-19 13:20:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2021-11-19 13:20:36,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-19 13:20:36,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-19 13:20:36,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:36,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:20:36,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:36,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:20:36,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,794 INFO L180 QuantifierPusher]: treesize reduction 93, result has 80.6 percent of original size [2021-11-19 13:20:36,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 387 [2021-11-19 13:20:36,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:20:36,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:516, output treesize:387 [2021-11-19 13:20:36,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,856 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:20:36,858 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:20:36,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:20:36,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:36,876 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:20:36,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:20:36,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:36,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:20:36,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:20:36,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:20:36,888 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:36,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:36,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,893 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:36,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-11-19 13:20:36,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:36,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:36,933 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:36,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:36,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,937 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:36,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:36,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:20:36,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:36,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-11-19 13:20:36,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:36,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:172 [2021-11-19 13:20:36,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:36,984 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.9 percent of original size [2021-11-19 13:20:36,985 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:36,986 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:36,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:20:36,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-19 13:20:36,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:36,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:37,026 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:20:37,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:20:37,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:37,030 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:37,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:37,032 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:37,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:37,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-19 13:20:37,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 13:20:37,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 13:20:37,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:37,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-19 13:20:37,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:20:37,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:20:37,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:37,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:37,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-11-19 13:20:37,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:20:37,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:183 [2021-11-19 13:20:37,055 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:20:37,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:20:37,062 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:20:37,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:20:37,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:20:37,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 10, 10] total 54 [2021-11-19 13:20:37,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600381241] [2021-11-19 13:20:37,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:37,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 13:20:37,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:37,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 13:20:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1549, Invalid=1873, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 13:20:37,279 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:38,959 INFO L93 Difference]: Finished difference Result 313 states and 361 transitions. [2021-11-19 13:20:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 13:20:38,960 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 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 47 [2021-11-19 13:20:38,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:38,963 INFO L225 Difference]: With dead ends: 313 [2021-11-19 13:20:38,963 INFO L226 Difference]: Without dead ends: 300 [2021-11-19 13:20:38,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3334, Invalid=5408, Unknown=0, NotChecked=0, Total=8742 [2021-11-19 13:20:38,967 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 718 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:38,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 147 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:20:38,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-19 13:20:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 94. [2021-11-19 13:20:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-11-19 13:20:38,991 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 47 [2021-11-19 13:20:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:38,992 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-11-19 13:20:38,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-11-19 13:20:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 13:20:38,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:38,995 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:39,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:39,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-11-19 13:20:39,220 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:39,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1790385632, now seen corresponding path program 6 times [2021-11-19 13:20:39,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:39,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447116251] [2021-11-19 13:20:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:39,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-19 13:20:40,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:40,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447116251] [2021-11-19 13:20:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447116251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:40,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098898534] [2021-11-19 13:20:40,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:20:40,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:40,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:40,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 13:23:21,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:23:21,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:23:21,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 13:23:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-19 13:23:23,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-19 13:23:25,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098898534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:25,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542658640] [2021-11-19 13:23:25,540 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:23:25,540 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:23:25,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:23:25,541 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:23:25,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:23:25,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,554 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:23:25,557 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:23:25,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:23:25,563 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_16|], 39=[|v_#valid_32|]} [2021-11-19 13:23:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:23:25,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:23:25,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:23:25,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:25,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,647 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:23:25,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:23:25,649 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:23:25,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:23:25,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:25,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,662 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:23:25,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:25,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:23:25,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,671 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:23:25,675 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.3 percent of original size 172 [2021-11-19 13:23:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-19 13:23:25,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:23:25,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,690 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:23:25,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:25,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,699 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-11-19 13:23:25,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-19 13:23:25,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:25,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:173, output treesize:157 [2021-11-19 13:23:25,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,791 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,800 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,801 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:23:25,802 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-19 13:23:25,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 13:23:25,807 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-19 13:23:25,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 406 [2021-11-19 13:23:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:23:25,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:23:25,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:23:25,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:25,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2021-11-19 13:23:25,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:23:25,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-19 13:23:25,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:25,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,934 INFO L180 QuantifierPusher]: treesize reduction 88, result has 81.1 percent of original size [2021-11-19 13:23:25,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 377 [2021-11-19 13:23:25,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:23:25,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:501, output treesize:377 [2021-11-19 13:23:25,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:25,997 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:23:25,998 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:25,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:23:26,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:23:26,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:26,015 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:23:26,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:23:26,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:23:26,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:23:26,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:26,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,022 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:23:26,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:26,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:23:26,027 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:23:26,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:23:26,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,031 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:26,032 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-19 13:23:26,033 INFO L185 QuantifierPusher]: treesize reduction 3, result has 94.9 percent of original size 56 [2021-11-19 13:23:26,070 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-19 13:23:26,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-19 13:23:26,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,073 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:26,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-19 13:23:26,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-19 13:23:26,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-19 13:23:26,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:23:26,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,088 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.9 percent of original size [2021-11-19 13:23:26,089 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-19 13:23:26,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:26,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:118 [2021-11-19 13:23:26,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,117 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.9 percent of original size [2021-11-19 13:23:26,118 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:26,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:23:26,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-19 13:23:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:26,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:26,158 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:23:26,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:23:26,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,161 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:26,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:23:26,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:23:26,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:23:26,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:23:26,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:26,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:26,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-11-19 13:23:26,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:26,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:170 [2021-11-19 13:23:26,180 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:23:26,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:23:26,185 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:23:27,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:23:27,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:23:27,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 135 [2021-11-19 13:23:27,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936366115] [2021-11-19 13:23:27,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 13:23:27,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-19 13:23:27,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:27,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-19 13:23:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=10945, Unknown=0, NotChecked=0, Total=19460 [2021-11-19 13:23:27,994 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 136 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 135 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:32,828 INFO L93 Difference]: Finished difference Result 664 states and 757 transitions. [2021-11-19 13:23:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-19 13:23:32,828 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 135 states have internal predecessors, (144), 0 states have call successors, (0), 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 92 [2021-11-19 13:23:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:32,832 INFO L225 Difference]: With dead ends: 664 [2021-11-19 13:23:32,832 INFO L226 Difference]: Without dead ends: 615 [2021-11-19 13:23:32,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 137 SyntacticMatches, 44 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22694 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=12739, Invalid=20933, Unknown=0, NotChecked=0, Total=33672 [2021-11-19 13:23:32,840 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1874 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 1149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1149 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:32,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1874 Valid, 333 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1149 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:23:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-11-19 13:23:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 184. [2021-11-19 13:23:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-11-19 13:23:32,898 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 92 [2021-11-19 13:23:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:32,899 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-11-19 13:23:32,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 135 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-11-19 13:23:32,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-19 13:23:32,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:32,903 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:32,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:33,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:23:33,113 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 222186702, now seen corresponding path program 7 times [2021-11-19 13:23:33,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:33,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846610963] [2021-11-19 13:23:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:33,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-19 13:23:36,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:23:36,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846610963] [2021-11-19 13:23:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846610963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:36,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934288375] [2021-11-19 13:23:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 13:23:36,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:23:36,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:23:36,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:23:36,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 13:23:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-19 13:23:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-19 13:23:40,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-19 13:23:49,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934288375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:49,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808140504] [2021-11-19 13:23:49,906 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 13:23:49,908 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:23:49,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:23:49,908 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:23:49,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:23:49,914 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:49,915 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:49,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:49,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:23:49,917 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:49,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:49,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:23:49,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 153 [2021-11-19 13:23:49,933 INFO L446 ElimStorePlain]: Different costs {9=[|v_#length_17|], 39=[|v_#valid_33|]} [2021-11-19 13:23:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-19 13:23:49,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:49,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:23:49,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:49,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-19 13:23:49,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:49,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:49,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:49,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,024 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-19 13:23:50,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 69 [2021-11-19 13:23:50,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:23:50,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 13:23:50,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-19 13:23:50,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:143 [2021-11-19 13:23:50,044 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,046 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:23:50,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-11-19 13:23:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:23:50,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:23:50,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:23:50,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-19 13:23:50,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:192, output treesize:174 [2021-11-19 13:23:50,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,154 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,160 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-19 13:23:50,162 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 13:23:50,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 408 [2021-11-19 13:23:50,167 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,170 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 363 [2021-11-19 13:23:50,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-19 13:23:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2021-11-19 13:23:50,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-19 13:23:50,220 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-19 13:23:50,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:50,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-19 13:23:50,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:23:50,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,243 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-19 13:23:50,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,282 INFO L180 QuantifierPusher]: treesize reduction 93, result has 80.6 percent of original size [2021-11-19 13:23:50,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 387 [2021-11-19 13:23:50,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-19 13:23:50,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:516, output treesize:387 [2021-11-19 13:23:50,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,338 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.5 percent of original size [2021-11-19 13:23:50,339 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,340 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 13:23:50,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-19 13:23:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:50,357 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-19 13:23:50,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-19 13:23:50,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:23:50,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 13:23:50,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-19 13:23:50,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:67 [2021-11-19 13:23:50,369 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:23:50,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:23:50,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,373 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-19 13:23:50,375 INFO L185 QuantifierPusher]: treesize reduction 3, result has 94.9 percent of original size 56 [2021-11-19 13:23:50,411 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-19 13:23:50,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-19 13:23:50,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,415 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 13:23:50,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 13:23:50,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 13:23:50,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:23:50,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,430 INFO L180 QuantifierPusher]: treesize reduction 7, result has 94.2 percent of original size [2021-11-19 13:23:50,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-19 13:23:50,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:114 [2021-11-19 13:23:50,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,458 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.9 percent of original size [2021-11-19 13:23:50,459 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-19 13:23:50,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-19 13:23:50,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:50,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:50,496 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-19 13:23:50,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-19 13:23:50,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,499 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:23:50,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:23:50,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:23:50,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:23:50,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-11-19 13:23:50,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 13:23:50,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:50,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-11-19 13:23:50,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-19 13:23:50,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:170 [2021-11-19 13:23:50,524 INFO L180 QuantifierPusher]: treesize reduction 37, result has 52.6 percent of original size [2021-11-19 13:23:50,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-19 13:23:50,530 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 13:23:55,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 13:23:55,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:23:55,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 268 [2021-11-19 13:23:55,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394407941] [2021-11-19 13:23:55,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 13:23:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2021-11-19 13:23:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2021-11-19 13:23:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33027, Invalid=41229, Unknown=0, NotChecked=0, Total=74256 [2021-11-19 13:23:55,935 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 269 states, 269 states have (on average 1.0223048327137547) internal successors, (275), 268 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:56,598 INFO L93 Difference]: Finished difference Result 368 states and 461 transitions. [2021-11-19 13:23:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-11-19 13:23:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 269 states, 269 states have (on average 1.0223048327137547) internal successors, (275), 268 states have internal predecessors, (275), 0 states have call successors, (0), 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 182 [2021-11-19 13:23:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:56,601 INFO L225 Difference]: With dead ends: 368 [2021-11-19 13:23:56,601 INFO L226 Difference]: Without dead ends: 274 [2021-11-19 13:23:56,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 274 SyntacticMatches, 89 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72962 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=33027, Invalid=41229, Unknown=0, NotChecked=0, Total=74256 [2021-11-19 13:23:56,607 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:56,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:23:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-19 13:23:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-11-19 13:23:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.010989010989011) internal successors, (276), 273 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 276 transitions. [2021-11-19 13:23:56,649 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 276 transitions. Word has length 182 [2021-11-19 13:23:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:56,650 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 276 transitions. [2021-11-19 13:23:56,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 269 states, 269 states have (on average 1.0223048327137547) internal successors, (275), 268 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 276 transitions. [2021-11-19 13:23:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-19 13:23:56,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:56,656 INFO L514 BasicCegarLoop]: trace histogram [178, 88, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:56,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:56,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:23:56,873 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:56,873 INFO L85 PathProgramCache]: Analyzing trace with hash -109262450, now seen corresponding path program 8 times [2021-11-19 13:23:56,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:56,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413075293] [2021-11-19 13:23:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:56,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19847 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-19 13:24:09,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:24:09,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413075293] [2021-11-19 13:24:09,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413075293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:24:09,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805978974] [2021-11-19 13:24:09,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:24:09,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:24:09,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:24:09,066 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:24:09,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49a371a-e74c-4336-ba87-d27d8a292313/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process