./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/sll-sorted-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-sorted-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:53:08,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:53:08,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:53:08,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:53:08,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:53:08,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:53:08,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:53:08,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:53:08,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:53:08,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:53:08,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:53:08,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:53:08,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:53:08,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:53:08,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:53:08,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:53:08,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:53:08,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:53:08,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:53:08,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:53:08,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:53:08,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:53:08,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:53:08,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:53:08,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:53:08,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:53:08,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:53:08,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:53:08,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:53:08,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:53:08,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:53:08,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:53:08,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:53:08,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:53:08,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:53:08,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:53:08,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:53:08,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:53:08,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:53:08,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:53:08,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:53:08,210 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-21 00:53:08,236 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:53:08,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:53:08,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:53:08,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:53:08,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:53:08,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:53:08,238 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:53:08,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:53:08,239 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:53:08,239 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:53:08,239 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:53:08,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:53:08,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:53:08,240 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:53:08,240 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:53:08,241 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:53:08,241 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:53:08,241 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:53:08,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:53:08,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:53:08,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:53:08,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:53:08,243 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:53:08,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:53:08,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:53:08,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:53:08,244 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:53:08,244 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:53:08,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:53:08,244 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:53:08,245 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:53:08,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:53:08,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:53:08,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:53:08,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:53:08,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:53:08,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:53:08,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:53:08,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:53:08,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:53:08,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:53:08,247 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_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 [2021-11-21 00:53:08,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:53:08,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:53:08,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:53:08,554 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:53:08,555 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:53:08,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-11-21 00:53:08,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/data/b3818025e/acd52f33b8594e1fa8b15e003fc9d477/FLAG8cf203fb1 [2021-11-21 00:53:09,191 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:53:09,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-11-21 00:53:09,212 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/data/b3818025e/acd52f33b8594e1fa8b15e003fc9d477/FLAG8cf203fb1 [2021-11-21 00:53:09,479 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/data/b3818025e/acd52f33b8594e1fa8b15e003fc9d477 [2021-11-21 00:53:09,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:53:09,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:53:09,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:53:09,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:53:09,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:53:09,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:53:09" (1/1) ... [2021-11-21 00:53:09,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d26b20a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:09, skipping insertion in model container [2021-11-21 00:53:09,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:53:09" (1/1) ... [2021-11-21 00:53:09,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:53:09,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:53:09,910 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-11-21 00:53:09,918 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-11-21 00:53:09,923 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-11-21 00:53:09,926 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-11-21 00:53:09,930 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-11-21 00:53:09,931 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-11-21 00:53:09,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:53:09,951 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:53:10,006 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-11-21 00:53:10,009 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-11-21 00:53:10,018 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-11-21 00:53:10,028 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-11-21 00:53:10,029 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-11-21 00:53:10,030 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_61c2b08c-e422-416d-8fa2-209ba7e33630/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-11-21 00:53:10,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:53:10,061 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:53:10,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10 WrapperNode [2021-11-21 00:53:10,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:53:10,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:53:10,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:53:10,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:53:10,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,113 INFO L137 Inliner]: procedures = 119, calls = 39, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 189 [2021-11-21 00:53:10,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:53:10,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:53:10,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:53:10,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:53:10,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:53:10,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:53:10,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:53:10,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:53:10,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (1/1) ... [2021-11-21 00:53:10,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:53:10,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:53:10,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:53:10,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:53:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:53:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:53:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:53:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:53:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:53:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:53:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:53:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:53:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:53:10,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:53:10,425 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:53:10,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:53:10,949 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:53:11,043 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:53:11,044 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-21 00:53:11,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:53:11 BoogieIcfgContainer [2021-11-21 00:53:11,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:53:11,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:53:11,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:53:11,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:53:11,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:53:09" (1/3) ... [2021-11-21 00:53:11,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee45fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:53:11, skipping insertion in model container [2021-11-21 00:53:11,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:10" (2/3) ... [2021-11-21 00:53:11,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee45fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:53:11, skipping insertion in model container [2021-11-21 00:53:11,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:53:11" (3/3) ... [2021-11-21 00:53:11,057 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-1.i [2021-11-21 00:53:11,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:53:11,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2021-11-21 00:53:11,101 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:53:11,108 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:53:11,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2021-11-21 00:53:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 68 states have (on average 2.4705882352941178) internal successors, (168), 136 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-21 00:53:11,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:11,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-21 00:53:11,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 11598, now seen corresponding path program 1 times [2021-11-21 00:53:11,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:11,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125638048] [2021-11-21 00:53:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:11,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:11,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125638048] [2021-11-21 00:53:11,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125638048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:11,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:11,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 00:53:11,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731256844] [2021-11-21 00:53:11,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:11,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:53:11,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:53:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:53:11,336 INFO L87 Difference]: Start difference. First operand has 137 states, 68 states have (on average 2.4705882352941178) internal successors, (168), 136 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:11,470 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2021-11-21 00:53:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:53:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-11-21 00:53:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:11,482 INFO L225 Difference]: With dead ends: 139 [2021-11-21 00:53:11,482 INFO L226 Difference]: Without dead ends: 137 [2021-11-21 00:53:11,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:53:11,487 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:11,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 81 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:53:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-21 00:53:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2021-11-21 00:53:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 133 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-11-21 00:53:11,530 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 2 [2021-11-21 00:53:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:11,531 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-11-21 00:53:11,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-11-21 00:53:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-21 00:53:11,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:11,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-21 00:53:11,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:53:11,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash 11599, now seen corresponding path program 1 times [2021-11-21 00:53:11,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:11,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584351069] [2021-11-21 00:53:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:11,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:11,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584351069] [2021-11-21 00:53:11,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584351069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:11,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:11,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 00:53:11,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293799340] [2021-11-21 00:53:11,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:11,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:53:11,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:53:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:53:11,580 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:11,685 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-11-21 00:53:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:53:11,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-11-21 00:53:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:11,687 INFO L225 Difference]: With dead ends: 135 [2021-11-21 00:53:11,687 INFO L226 Difference]: Without dead ends: 135 [2021-11-21 00:53:11,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:53:11,689 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 128 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:11,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 81 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:53:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-21 00:53:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-11-21 00:53:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 68 states have (on average 2.073529411764706) internal successors, (141), 131 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2021-11-21 00:53:11,701 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 2 [2021-11-21 00:53:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:11,702 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2021-11-21 00:53:11,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2021-11-21 00:53:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:53:11,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:11,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:53:11,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:53:11,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2130162285, now seen corresponding path program 1 times [2021-11-21 00:53:11,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:11,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820433955] [2021-11-21 00:53:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:11,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:11,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820433955] [2021-11-21 00:53:11,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820433955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:11,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:11,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:53:11,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7431488] [2021-11-21 00:53:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:11,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:53:11,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:53:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:53:11,771 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-11-21 00:53:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:11,946 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2021-11-21 00:53:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:53:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 [2021-11-21 00:53:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:11,948 INFO L225 Difference]: With dead ends: 138 [2021-11-21 00:53:11,948 INFO L226 Difference]: Without dead ends: 138 [2021-11-21 00:53:11,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:11,950 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 215 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:11,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 58 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:53:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-21 00:53:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2021-11-21 00:53:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.8395061728395061) internal successors, (149), 128 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2021-11-21 00:53:11,975 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 6 [2021-11-21 00:53:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:11,975 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2021-11-21 00:53:11,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-11-21 00:53:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2021-11-21 00:53:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:53:11,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:11,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:53:11,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:53:11,977 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2130162286, now seen corresponding path program 1 times [2021-11-21 00:53:11,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:11,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916413385] [2021-11-21 00:53:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:11,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:12,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:12,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916413385] [2021-11-21 00:53:12,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916413385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:12,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:12,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:53:12,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265852214] [2021-11-21 00:53:12,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:12,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:53:12,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:53:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:53:12,120 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-21 00:53:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:12,366 INFO L93 Difference]: Finished difference Result 190 states and 211 transitions. [2021-11-21 00:53:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:53:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-11-21 00:53:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:12,368 INFO L225 Difference]: With dead ends: 190 [2021-11-21 00:53:12,368 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 00:53:12,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:12,369 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 237 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:12,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 99 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:53:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 00:53:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 166. [2021-11-21 00:53:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 118 states have (on average 1.7033898305084745) internal successors, (201), 165 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 201 transitions. [2021-11-21 00:53:12,380 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 201 transitions. Word has length 6 [2021-11-21 00:53:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:12,381 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 201 transitions. [2021-11-21 00:53:12,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-21 00:53:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 201 transitions. [2021-11-21 00:53:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:53:12,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:12,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:12,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:53:12,382 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1613471248, now seen corresponding path program 1 times [2021-11-21 00:53:12,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193899305] [2021-11-21 00:53:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:12,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:12,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193899305] [2021-11-21 00:53:12,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193899305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:12,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:12,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:53:12,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042757191] [2021-11-21 00:53:12,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:12,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:53:12,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:53:12,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:53:12,432 INFO L87 Difference]: Start difference. First operand 166 states and 201 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:12,474 INFO L93 Difference]: Finished difference Result 196 states and 233 transitions. [2021-11-21 00:53:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:53:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:53:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:12,483 INFO L225 Difference]: With dead ends: 196 [2021-11-21 00:53:12,483 INFO L226 Difference]: Without dead ends: 196 [2021-11-21 00:53:12,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:53:12,485 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 85 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:12,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 151 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:53:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-21 00:53:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 168. [2021-11-21 00:53:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 120 states have (on average 1.6833333333333333) internal successors, (202), 167 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 202 transitions. [2021-11-21 00:53:12,506 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 202 transitions. Word has length 8 [2021-11-21 00:53:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:12,507 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 202 transitions. [2021-11-21 00:53:12,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 202 transitions. [2021-11-21 00:53:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:53:12,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:12,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:12,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:53:12,508 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1613126838, now seen corresponding path program 1 times [2021-11-21 00:53:12,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:12,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585762816] [2021-11-21 00:53:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:12,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:12,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585762816] [2021-11-21 00:53:12,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585762816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:12,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:12,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:53:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931018477] [2021-11-21 00:53:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:53:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:53:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:12,603 INFO L87 Difference]: Start difference. First operand 168 states and 202 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:12,778 INFO L93 Difference]: Finished difference Result 173 states and 207 transitions. [2021-11-21 00:53:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:53:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:53:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:12,779 INFO L225 Difference]: With dead ends: 173 [2021-11-21 00:53:12,780 INFO L226 Difference]: Without dead ends: 173 [2021-11-21 00:53:12,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:53:12,781 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 79 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:12,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 195 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:53:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-21 00:53:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2021-11-21 00:53:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 120 states have (on average 1.675) internal successors, (201), 166 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 201 transitions. [2021-11-21 00:53:12,786 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 201 transitions. Word has length 8 [2021-11-21 00:53:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:12,787 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 201 transitions. [2021-11-21 00:53:12,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 201 transitions. [2021-11-21 00:53:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:53:12,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:12,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:12,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:53:12,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:12,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1613126837, now seen corresponding path program 1 times [2021-11-21 00:53:12,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:12,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650407101] [2021-11-21 00:53:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:12,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:12,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650407101] [2021-11-21 00:53:12,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650407101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:12,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:12,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:53:12,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377600627] [2021-11-21 00:53:12,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:12,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:53:12,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:53:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:12,850 INFO L87 Difference]: Start difference. First operand 167 states and 201 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:13,067 INFO L93 Difference]: Finished difference Result 162 states and 196 transitions. [2021-11-21 00:53:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:53:13,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:53:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:13,069 INFO L225 Difference]: With dead ends: 162 [2021-11-21 00:53:13,069 INFO L226 Difference]: Without dead ends: 162 [2021-11-21 00:53:13,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:53:13,070 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:13,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:53:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-21 00:53:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2021-11-21 00:53:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 116 states have (on average 1.6551724137931034) internal successors, (192), 157 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 192 transitions. [2021-11-21 00:53:13,077 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 192 transitions. Word has length 8 [2021-11-21 00:53:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:13,077 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 192 transitions. [2021-11-21 00:53:13,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 192 transitions. [2021-11-21 00:53:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:53:13,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:13,078 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:13,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:53:13,079 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1672581694, now seen corresponding path program 1 times [2021-11-21 00:53:13,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:13,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719257572] [2021-11-21 00:53:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:13,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:53:13,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:13,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719257572] [2021-11-21 00:53:13,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719257572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:13,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:13,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:53:13,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706608578] [2021-11-21 00:53:13,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:13,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:53:13,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:53:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:53:13,164 INFO L87 Difference]: Start difference. First operand 158 states and 192 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-11-21 00:53:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:13,286 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2021-11-21 00:53:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:53:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 15 [2021-11-21 00:53:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:13,288 INFO L225 Difference]: With dead ends: 181 [2021-11-21 00:53:13,288 INFO L226 Difference]: Without dead ends: 181 [2021-11-21 00:53:13,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:13,290 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 216 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:13,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 138 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:53:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-21 00:53:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 156. [2021-11-21 00:53:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.6347826086956523) internal successors, (188), 155 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 188 transitions. [2021-11-21 00:53:13,300 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 188 transitions. Word has length 15 [2021-11-21 00:53:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:13,300 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 188 transitions. [2021-11-21 00:53:13,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-11-21 00:53:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 188 transitions. [2021-11-21 00:53:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:53:13,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:13,302 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:13,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:53:13,302 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:13,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1268493528, now seen corresponding path program 1 times [2021-11-21 00:53:13,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:13,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373641575] [2021-11-21 00:53:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:13,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:13,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373641575] [2021-11-21 00:53:13,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373641575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:53:13,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203414985] [2021-11-21 00:53:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:13,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:53:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:53:13,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:53:13,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:53:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:53:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:53:13,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:53:13,740 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:53:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:53:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:53:13,954 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:13,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-21 00:53:14,089 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 00:53:14,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-11-21 00:53:14,453 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-21 00:53:14,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 33 [2021-11-21 00:53:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:14,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:53:20,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 380 [2021-11-21 00:53:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:25,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203414985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:53:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311487050] [2021-11-21 00:53:25,823 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 00:53:25,823 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:53:25,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:53:25,835 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:53:25,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:53:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:25,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:53:25,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:25,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 00:53:26,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:53:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:53:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:53:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 00:53:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:53:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:53:26,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:53:26,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-21 00:53:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 00:53:26,806 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:26,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:53:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:26,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:53:26,907 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:53:26,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-21 00:53:27,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:53:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:53:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 00:53:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 00:53:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2021-11-21 00:53:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:53:27,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:27,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-11-21 00:53:28,209 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-21 00:53:28,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 160 [2021-11-21 00:53:28,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:28,258 INFO L354 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2021-11-21 00:53:28,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 184 [2021-11-21 00:53:28,301 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-21 00:53:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 166 [2021-11-21 00:53:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:28,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:28,781 INFO L354 Elim1Store]: treesize reduction 134, result has 24.3 percent of original size [2021-11-21 00:53:28,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 419 treesize of output 421 [2021-11-21 00:53:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:28,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:28,853 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:53:28,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 426 treesize of output 371 [2021-11-21 00:53:28,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:28,911 INFO L354 Elim1Store]: treesize reduction 120, result has 13.7 percent of original size [2021-11-21 00:53:28,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 407 treesize of output 381 [2021-11-21 00:53:29,921 INFO L354 Elim1Store]: treesize reduction 170, result has 15.0 percent of original size [2021-11-21 00:53:29,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 361 treesize of output 367 [2021-11-21 00:53:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:30,795 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-11-21 00:53:30,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 437 treesize of output 402 [2021-11-21 00:53:30,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:30,861 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-11-21 00:53:30,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 469 treesize of output 451 [2021-11-21 00:53:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:30,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:30,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:30,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:30,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:30,964 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-21 00:53:30,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 457 treesize of output 443 [2021-11-21 00:53:32,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:32,837 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-11-21 00:53:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 768 treesize of output 457 [2021-11-21 00:53:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:32,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:32,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:32,972 INFO L354 Elim1Store]: treesize reduction 530, result has 12.7 percent of original size [2021-11-21 00:53:32,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 655 treesize of output 644 [2021-11-21 00:53:33,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:53:33,063 INFO L354 Elim1Store]: treesize reduction 244, result has 16.7 percent of original size [2021-11-21 00:53:33,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 640 treesize of output 590 [2021-11-21 00:53:34,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:53:34,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:53:34,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:53:34,288 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:53:34,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:53:34,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-21 00:53:34,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:53:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:53:34,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:53:34,626 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:34,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 119 [2021-11-21 00:53:34,645 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:34,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 99 [2021-11-21 00:53:34,675 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 00:53:34,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 79 [2021-11-21 00:53:34,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:53:34,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:53:34,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:53:35,720 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:53:35,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:53:35,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-21 00:53:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:35,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:35,914 INFO L354 Elim1Store]: treesize reduction 108, result has 31.6 percent of original size [2021-11-21 00:53:35,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 312 treesize of output 335 [2021-11-21 00:53:35,950 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:53:35,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 339 [2021-11-21 00:53:36,030 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:53:36,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 363 [2021-11-21 00:53:39,381 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:39,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 311 [2021-11-21 00:53:39,463 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-21 00:53:39,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 349 [2021-11-21 00:53:39,499 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:39,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 323 [2021-11-21 00:53:47,857 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:53:50,618 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:53:50,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:53:50,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2021-11-21 00:53:50,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571751518] [2021-11-21 00:53:50,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:53:50,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:53:50,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:53:50,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1857, Unknown=3, NotChecked=0, Total=2070 [2021-11-21 00:53:50,621 INFO L87 Difference]: Start difference. First operand 156 states and 188 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:51,315 INFO L93 Difference]: Finished difference Result 184 states and 221 transitions. [2021-11-21 00:53:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:53:51,316 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2021-11-21 00:53:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:51,318 INFO L225 Difference]: With dead ends: 184 [2021-11-21 00:53:51,318 INFO L226 Difference]: Without dead ends: 184 [2021-11-21 00:53:51,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=298, Invalid=2455, Unknown=3, NotChecked=0, Total=2756 [2021-11-21 00:53:51,321 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 24 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:51,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 945 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 449 Invalid, 0 Unknown, 530 Unchecked, 0.4s Time] [2021-11-21 00:53:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-21 00:53:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 173. [2021-11-21 00:53:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 172 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-11-21 00:53:51,327 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 20 [2021-11-21 00:53:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:51,328 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-11-21 00:53:51,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-11-21 00:53:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:53:51,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:51,330 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:51,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:53:51,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:53:51,554 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:53:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:51,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1268493527, now seen corresponding path program 1 times [2021-11-21 00:53:51,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:51,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444501043] [2021-11-21 00:53:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:51,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:51,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444501043] [2021-11-21 00:53:51,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444501043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:53:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134132567] [2021-11-21 00:53:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:51,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:53:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:53:51,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:53:51,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:53:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 00:53:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:53:51,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:53:52,006 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:53:52,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:53:52,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:53:52,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:53:52,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:53:52,156 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:52,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 00:53:52,170 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:53:52,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-21 00:53:52,251 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 00:53:52,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 78 [2021-11-21 00:53:52,270 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-21 00:53:52,271 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 78 treesize of output 53 [2021-11-21 00:53:52,574 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-21 00:53:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 54 [2021-11-21 00:53:52,585 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-21 00:53:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 31 [2021-11-21 00:53:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:53:52,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:53:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1658 treesize of output 1634 [2021-11-21 00:53:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7373 treesize of output 7245 [2021-11-21 00:53:59,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:53:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864597016] [2021-11-21 00:53:59,623 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 00:53:59,623 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:53:59,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:53:59,624 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:53:59,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:53:59,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:59,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:59,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:53:59,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:53:59,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:59,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 00:53:59,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:53:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:59,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 00:53:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:59,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:53:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:53:59,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:54:00,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:54:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-21 00:54:00,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:54:00,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 00:54:00,396 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:00,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-21 00:54:00,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:54:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:54:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:54:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 00:54:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:54:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 00:54:01,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-11-21 00:54:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:54:01,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2021-11-21 00:54:01,579 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-21 00:54:01,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 160 [2021-11-21 00:54:01,618 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-21 00:54:01,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 221 [2021-11-21 00:54:01,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:01,661 INFO L354 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2021-11-21 00:54:01,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 215 treesize of output 212 [2021-11-21 00:54:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:01,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:01,959 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:54:01,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 451 treesize of output 364 [2021-11-21 00:54:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:01,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:01,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:02,008 INFO L354 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2021-11-21 00:54:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 432 treesize of output 434 [2021-11-21 00:54:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:02,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:02,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:02,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:02,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:02,026 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-21 00:54:02,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 421 [2021-11-21 00:54:02,893 INFO L354 Elim1Store]: treesize reduction 292, result has 12.8 percent of original size [2021-11-21 00:54:02,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 387 treesize of output 398 [2021-11-21 00:54:03,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:03,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:03,643 INFO L354 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-11-21 00:54:03,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 471 treesize of output 392 [2021-11-21 00:54:03,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:03,712 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 00:54:03,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 455 treesize of output 445 [2021-11-21 00:54:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:03,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:03,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:03,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:03,765 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-11-21 00:54:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 443 treesize of output 429 [2021-11-21 00:54:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:05,795 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-11-21 00:54:05,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 666 treesize of output 436 [2021-11-21 00:54:05,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:05,986 INFO L354 Elim1Store]: treesize reduction 240, result has 17.0 percent of original size [2021-11-21 00:54:05,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 617 treesize of output 605 [2021-11-21 00:54:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:06,223 INFO L354 Elim1Store]: treesize reduction 434, result has 11.6 percent of original size [2021-11-21 00:54:06,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 616 treesize of output 597 [2021-11-21 00:54:08,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:54:08,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:08,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:08,623 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:54:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:54:08,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-21 00:54:08,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:08,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:54:08,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:54:08,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:54:08,895 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:08,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-11-21 00:54:08,908 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 115 [2021-11-21 00:54:08,934 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 00:54:08,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 100 [2021-11-21 00:54:09,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:54:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:09,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:09,867 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:54:09,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:54:09,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-21 00:54:09,961 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:54:09,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 310 [2021-11-21 00:54:09,989 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:54:09,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 350 [2021-11-21 00:54:09,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:09,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:10,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:10,061 INFO L354 Elim1Store]: treesize reduction 108, result has 31.6 percent of original size [2021-11-21 00:54:10,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 367 treesize of output 390 [2021-11-21 00:54:14,341 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:14,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 302 [2021-11-21 00:54:14,449 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-21 00:54:14,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 299 treesize of output 300 [2021-11-21 00:54:14,481 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 274 [2021-11-21 00:54:17,580 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:54:19,796 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:54:19,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:54:19,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-21 00:54:19,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604381319] [2021-11-21 00:54:19,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:54:19,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:54:19,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:54:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1711, Unknown=3, NotChecked=0, Total=1892 [2021-11-21 00:54:19,798 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:20,493 INFO L93 Difference]: Finished difference Result 223 states and 260 transitions. [2021-11-21 00:54:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:54:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-11-21 00:54:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:20,495 INFO L225 Difference]: With dead ends: 223 [2021-11-21 00:54:20,495 INFO L226 Difference]: Without dead ends: 223 [2021-11-21 00:54:20,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=253, Invalid=2396, Unknown=3, NotChecked=0, Total=2652 [2021-11-21 00:54:20,498 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 269 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:20,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 283 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:54:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-21 00:54:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 173. [2021-11-21 00:54:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 132 states have (on average 1.5757575757575757) internal successors, (208), 172 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2021-11-21 00:54:20,504 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 20 [2021-11-21 00:54:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:20,504 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2021-11-21 00:54:20,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2021-11-21 00:54:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:54:20,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:20,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:20,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 00:54:20,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:54:20,727 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:54:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash -668303993, now seen corresponding path program 1 times [2021-11-21 00:54:20,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:20,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087109543] [2021-11-21 00:54:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:20,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:20,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087109543] [2021-11-21 00:54:20,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087109543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:20,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:20,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:54:20,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377506160] [2021-11-21 00:54:20,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:20,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:54:20,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:20,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:54:20,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:54:20,777 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:20,811 INFO L93 Difference]: Finished difference Result 175 states and 210 transitions. [2021-11-21 00:54:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:54:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 00:54:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:20,813 INFO L225 Difference]: With dead ends: 175 [2021-11-21 00:54:20,813 INFO L226 Difference]: Without dead ends: 175 [2021-11-21 00:54:20,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:54:20,815 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:20,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:54:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-21 00:54:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-21 00:54:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 134 states have (on average 1.5671641791044777) internal successors, (210), 174 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 210 transitions. [2021-11-21 00:54:20,820 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 210 transitions. Word has length 21 [2021-11-21 00:54:20,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:20,821 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 210 transitions. [2021-11-21 00:54:20,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 210 transitions. [2021-11-21 00:54:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:54:20,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:20,824 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:20,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:54:20,824 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:54:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1734514724, now seen corresponding path program 1 times [2021-11-21 00:54:20,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:20,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001582081] [2021-11-21 00:54:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:20,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:20,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001582081] [2021-11-21 00:54:20,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001582081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:20,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:20,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:54:20,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336598837] [2021-11-21 00:54:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:20,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:54:20,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:20,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:54:20,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:54:20,885 INFO L87 Difference]: Start difference. First operand 175 states and 210 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:21,101 INFO L93 Difference]: Finished difference Result 196 states and 234 transitions. [2021-11-21 00:54:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:54:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 00:54:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:21,102 INFO L225 Difference]: With dead ends: 196 [2021-11-21 00:54:21,102 INFO L226 Difference]: Without dead ends: 196 [2021-11-21 00:54:21,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:54:21,103 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 86 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:21,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 179 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:54:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-21 00:54:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 181. [2021-11-21 00:54:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 141 states have (on average 1.5673758865248226) internal successors, (221), 180 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2021-11-21 00:54:21,108 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 23 [2021-11-21 00:54:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:21,109 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2021-11-21 00:54:21,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2021-11-21 00:54:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:54:21,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:21,110 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:21,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:54:21,110 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:54:21,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:21,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1734514725, now seen corresponding path program 1 times [2021-11-21 00:54:21,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:21,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734751383] [2021-11-21 00:54:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:21,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:21,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734751383] [2021-11-21 00:54:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734751383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:54:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770329003] [2021-11-21 00:54:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:21,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:54:21,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:54:21,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:54:21,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:54:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 00:54:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:54:21,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:54:21,520 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:54:21,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:54:21,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:54:21,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:54:21,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-21 00:54:21,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 00:54:21,688 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 00:54:21,689 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 38 treesize of output 25 [2021-11-21 00:54:22,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2021-11-21 00:54:22,030 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-21 00:54:22,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 00:54:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:22,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:54:22,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:54:22,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-11-21 00:54:29,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 680 treesize of output 664 [2021-11-21 00:54:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:31,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770329003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:54:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1446227851] [2021-11-21 00:54:31,250 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:54:31,250 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:54:31,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:54:31,250 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:54:31,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:54:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:54:31,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:54:31,358 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:54:31,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 00:54:31,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:54:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:54:31,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 00:54:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:54:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:31,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:54:31,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 00:54:31,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-21 00:54:31,970 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:31,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:54:32,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:54:32,029 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:54:32,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-21 00:54:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:54:32,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:54:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 00:54:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 00:54:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-11-21 00:54:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:54:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2021-11-21 00:54:32,933 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 00:54:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 178 [2021-11-21 00:54:32,960 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 00:54:32,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 186 [2021-11-21 00:54:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:32,995 INFO L354 Elim1Store]: treesize reduction 160, result has 14.4 percent of original size [2021-11-21 00:54:32,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 201 treesize of output 198 [2021-11-21 00:54:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:33,323 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-11-21 00:54:33,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 437 treesize of output 386 [2021-11-21 00:54:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:33,390 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-11-21 00:54:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 379 [2021-11-21 00:54:33,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:33,470 INFO L354 Elim1Store]: treesize reduction 208, result has 19.1 percent of original size [2021-11-21 00:54:33,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 401 [2021-11-21 00:54:34,130 INFO L354 Elim1Store]: treesize reduction 170, result has 15.0 percent of original size [2021-11-21 00:54:34,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 379 treesize of output 385 [2021-11-21 00:54:35,018 INFO L354 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2021-11-21 00:54:35,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 455 treesize of output 420 [2021-11-21 00:54:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:35,159 INFO L354 Elim1Store]: treesize reduction 256, result has 13.8 percent of original size [2021-11-21 00:54:35,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 487 treesize of output 473 [2021-11-21 00:54:35,208 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-21 00:54:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 472 treesize of output 441 [2021-11-21 00:54:36,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:36,867 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-11-21 00:54:36,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 836 treesize of output 469 [2021-11-21 00:54:36,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:36,945 INFO L354 Elim1Store]: treesize reduction 244, result has 16.7 percent of original size [2021-11-21 00:54:36,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 667 treesize of output 605 [2021-11-21 00:54:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:36,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:54:37,055 INFO L354 Elim1Store]: treesize reduction 544, result has 10.4 percent of original size [2021-11-21 00:54:37,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 638 treesize of output 613 [2021-11-21 00:54:38,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:54:38,476 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:54:38,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 00:54:38,527 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:54:38,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:54:38,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:54:38,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:54:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:38,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:54:38,825 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:38,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-11-21 00:54:38,853 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:38,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 90 [2021-11-21 00:54:38,873 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 00:54:38,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 75 [2021-11-21 00:54:39,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:54:39,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:54:42,240 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:54:42,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 00:54:42,280 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:54:42,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:54:42,397 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:54:42,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 316 [2021-11-21 00:54:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:42,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:54:42,490 INFO L354 Elim1Store]: treesize reduction 108, result has 31.6 percent of original size [2021-11-21 00:54:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 333 treesize of output 356 [2021-11-21 00:54:42,522 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:54:42,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 360 [2021-11-21 00:54:46,635 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:46,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 349 treesize of output 308 [2021-11-21 00:54:46,712 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-21 00:54:46,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 345 treesize of output 346 [2021-11-21 00:54:46,729 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:54:46,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 337 treesize of output 320 [2021-11-21 00:54:49,368 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:54:51,605 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:54:51,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:54:51,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2021-11-21 00:54:51,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908155519] [2021-11-21 00:54:51,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:54:51,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 00:54:51,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 00:54:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2631, Unknown=3, NotChecked=0, Total=2862 [2021-11-21 00:54:51,607 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:14,256 INFO L93 Difference]: Finished difference Result 483 states and 568 transitions. [2021-11-21 00:55:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-21 00:55:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 00:55:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:14,259 INFO L225 Difference]: With dead ends: 483 [2021-11-21 00:55:14,259 INFO L226 Difference]: Without dead ends: 483 [2021-11-21 00:55:14,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=635, Invalid=5836, Unknown=9, NotChecked=0, Total=6480 [2021-11-21 00:55:14,261 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 647 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:14,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1840 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1494 Invalid, 0 Unknown, 701 Unchecked, 1.1s Time] [2021-11-21 00:55:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-21 00:55:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 197. [2021-11-21 00:55:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 163 states have (on average 1.478527607361963) internal successors, (241), 196 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 241 transitions. [2021-11-21 00:55:14,270 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 241 transitions. Word has length 23 [2021-11-21 00:55:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:14,270 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 241 transitions. [2021-11-21 00:55:14,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 241 transitions. [2021-11-21 00:55:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:55:14,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:14,271 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:14,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:14,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:55:14,494 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:55:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2003424393, now seen corresponding path program 1 times [2021-11-21 00:55:14,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:14,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58111288] [2021-11-21 00:55:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:14,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:55:14,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58111288] [2021-11-21 00:55:14,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58111288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:14,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:14,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:55:14,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546219299] [2021-11-21 00:55:14,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:14,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:55:14,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:55:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:55:14,539 INFO L87 Difference]: Start difference. First operand 197 states and 241 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:14,608 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2021-11-21 00:55:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:55:14,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 00:55:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:14,610 INFO L225 Difference]: With dead ends: 195 [2021-11-21 00:55:14,611 INFO L226 Difference]: Without dead ends: 195 [2021-11-21 00:55:14,611 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 [2021-11-21 00:55:14,612 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 59 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:14,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 101 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:55:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-21 00:55:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-11-21 00:55:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 163 states have (on average 1.4478527607361964) internal successors, (236), 193 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2021-11-21 00:55:14,625 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 23 [2021-11-21 00:55:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:14,626 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2021-11-21 00:55:14,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2021-11-21 00:55:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:55:14,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:14,627 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:14,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:55:14,627 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:55:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:14,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2003424394, now seen corresponding path program 1 times [2021-11-21 00:55:14,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:14,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257103492] [2021-11-21 00:55:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:14,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:55:14,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257103492] [2021-11-21 00:55:14,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257103492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:14,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:55:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644153660] [2021-11-21 00:55:14,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:14,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:55:14,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:55:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:55:14,660 INFO L87 Difference]: Start difference. First operand 194 states and 236 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:14,724 INFO L93 Difference]: Finished difference Result 191 states and 231 transitions. [2021-11-21 00:55:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:55:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 00:55:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:14,727 INFO L225 Difference]: With dead ends: 191 [2021-11-21 00:55:14,727 INFO L226 Difference]: Without dead ends: 191 [2021-11-21 00:55:14,727 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 [2021-11-21 00:55:14,728 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 63 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:14,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 88 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:55:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-21 00:55:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-21 00:55:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 163 states have (on average 1.4171779141104295) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2021-11-21 00:55:14,734 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 23 [2021-11-21 00:55:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:14,734 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2021-11-21 00:55:14,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2021-11-21 00:55:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:55:14,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:14,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:14,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:55:14,736 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:55:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2003432307, now seen corresponding path program 1 times [2021-11-21 00:55:14,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:14,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91601656] [2021-11-21 00:55:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:14,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:55:14,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91601656] [2021-11-21 00:55:14,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91601656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:14,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:14,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:55:14,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461807252] [2021-11-21 00:55:14,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:14,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:55:14,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:14,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:55:14,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:55:14,811 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:14,933 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-11-21 00:55:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:55:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 00:55:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:14,935 INFO L225 Difference]: With dead ends: 197 [2021-11-21 00:55:14,935 INFO L226 Difference]: Without dead ends: 197 [2021-11-21 00:55:14,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:55:14,936 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 20 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:14,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 201 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:55:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-21 00:55:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2021-11-21 00:55:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 165 states have (on average 1.406060606060606) internal successors, (232), 192 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 232 transitions. [2021-11-21 00:55:14,942 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 232 transitions. Word has length 23 [2021-11-21 00:55:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:14,942 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 232 transitions. [2021-11-21 00:55:14,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 232 transitions. [2021-11-21 00:55:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:55:14,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:14,944 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:14,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:55:14,944 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:55:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 419814097, now seen corresponding path program 1 times [2021-11-21 00:55:14,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:14,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256124155] [2021-11-21 00:55:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:14,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:55:15,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:15,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256124155] [2021-11-21 00:55:15,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256124155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:15,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:15,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:55:15,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795927367] [2021-11-21 00:55:15,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:15,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:55:15,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:55:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:55:15,015 INFO L87 Difference]: Start difference. First operand 193 states and 232 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 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) [2021-11-21 00:55:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:15,240 INFO L93 Difference]: Finished difference Result 213 states and 253 transitions. [2021-11-21 00:55:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:55:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 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) Word has length 25 [2021-11-21 00:55:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:15,242 INFO L225 Difference]: With dead ends: 213 [2021-11-21 00:55:15,242 INFO L226 Difference]: Without dead ends: 213 [2021-11-21 00:55:15,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:55:15,242 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 51 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:15,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 214 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:55:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-21 00:55:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 191. [2021-11-21 00:55:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 165 states have (on average 1.3757575757575757) internal successors, (227), 190 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 227 transitions. [2021-11-21 00:55:15,246 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 227 transitions. Word has length 25 [2021-11-21 00:55:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:15,246 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 227 transitions. [2021-11-21 00:55:15,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 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) [2021-11-21 00:55:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 227 transitions. [2021-11-21 00:55:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:55:15,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:15,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:15,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:55:15,247 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:55:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash 184551787, now seen corresponding path program 1 times [2021-11-21 00:55:15,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398074294] [2021-11-21 00:55:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:15,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:15,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:15,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398074294] [2021-11-21 00:55:15,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398074294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:55:15,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870909948] [2021-11-21 00:55:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:15,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:15,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:15,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:55:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:15,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 00:55:15,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:15,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:55:15,628 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:55:15,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:55:15,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:55:15,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:55:15,747 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:55:15,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:55:15,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:15,770 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:55:15,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-21 00:55:15,852 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-21 00:55:15,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 97 [2021-11-21 00:55:15,868 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-21 00:55:15,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 73 [2021-11-21 00:55:16,201 INFO L354 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2021-11-21 00:55:16,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 81 [2021-11-21 00:55:16,220 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-11-21 00:55:16,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 42 [2021-11-21 00:55:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:16,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:23,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:55:23,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 55987 treesize of output 50423 [2021-11-21 00:55:25,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:25,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:27,160 INFO L354 Elim1Store]: treesize reduction 624, result has 48.3 percent of original size [2021-11-21 00:55:27,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 1310443 treesize of output 1265604 [2021-11-21 00:57:14,135 WARN L227 SmtUtils]: Spent 1.78m on a formula simplification. DAG size of input: 1554 DAG size of output: 1529 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:57:14,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:57:14,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1077592 treesize of output 1077172 [2021-11-21 00:58:51,091 WARN L227 SmtUtils]: Spent 1.61m on a formula simplification. DAG size of input: 1563 DAG size of output: 1555 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:58:56,549 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 1540 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:58:56,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:58:56,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452228092] [2021-11-21 00:58:56,981 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:58:56,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:58:56,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:58:56,982 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:58:56,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:58:57,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:58:57,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 00:58:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:58:57,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:58:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:58:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 00:58:57,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:58:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:58:57,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 00:58:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-21 00:58:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:58:57,616 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:58:57,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:58:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:58:57,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:58:57,721 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:58:57,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-21 00:58:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 00:58:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:57,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:58:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-21 00:58:58,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 00:58:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:58:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2021-11-21 00:58:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-11-21 00:58:58,613 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 00:58:58,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 178 [2021-11-21 00:58:58,641 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 00:58:58,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 186 [2021-11-21 00:58:58,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:58:58,671 INFO L354 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2021-11-21 00:58:58,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 175 treesize of output 172 [2021-11-21 00:58:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:58:58,985 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:58:58,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 415 treesize of output 368 [2021-11-21 00:58:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:58,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:58:59,028 INFO L354 Elim1Store]: treesize reduction 120, result has 13.7 percent of original size [2021-11-21 00:58:59,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 396 treesize of output 374 [2021-11-21 00:58:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:59,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:58:59,106 INFO L354 Elim1Store]: treesize reduction 134, result has 24.3 percent of original size [2021-11-21 00:58:59,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 377 treesize of output 379 [2021-11-21 00:59:00,137 INFO L354 Elim1Store]: treesize reduction 170, result has 15.0 percent of original size [2021-11-21 00:59:00,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 357 treesize of output 363 [2021-11-21 00:59:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:00,740 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-11-21 00:59:00,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 433 treesize of output 402 [2021-11-21 00:59:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:00,784 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-11-21 00:59:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 465 treesize of output 451 [2021-11-21 00:59:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:00,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:00,881 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-21 00:59:00,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 453 treesize of output 439 [2021-11-21 00:59:02,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:02,610 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-21 00:59:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 694 treesize of output 440 [2021-11-21 00:59:02,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:02,686 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-11-21 00:59:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 689 treesize of output 595 [2021-11-21 00:59:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:02,823 INFO L354 Elim1Store]: treesize reduction 424, result has 14.3 percent of original size [2021-11-21 00:59:02,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 680 treesize of output 669 [2021-11-21 00:59:04,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:04,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:59:04,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:04,127 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:59:04,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 00:59:04,244 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:59:04,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:59:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:04,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:59:04,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:59:04,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:59:04,503 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:04,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-11-21 00:59:04,522 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:04,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 115 [2021-11-21 00:59:04,536 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 00:59:04,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 100 [2021-11-21 00:59:04,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:04,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:59:04,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:07,302 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:59:07,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:59:07,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-21 00:59:07,404 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:59:07,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 319 [2021-11-21 00:59:07,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:07,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:07,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:07,475 INFO L354 Elim1Store]: treesize reduction 108, result has 31.6 percent of original size [2021-11-21 00:59:07,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 352 treesize of output 375 [2021-11-21 00:59:07,500 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:59:07,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 379 [2021-11-21 00:59:10,647 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:10,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 311 [2021-11-21 00:59:10,707 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-21 00:59:10,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 349 [2021-11-21 00:59:10,727 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:10,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 323 [2021-11-21 00:59:20,568 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:22,825 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:22,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:59:22,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-21 00:59:22,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046076586] [2021-11-21 00:59:22,826 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:22,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:59:22,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:59:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1836, Unknown=3, NotChecked=0, Total=1980 [2021-11-21 00:59:22,827 INFO L87 Difference]: Start difference. First operand 191 states and 227 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:23,875 INFO L93 Difference]: Finished difference Result 235 states and 272 transitions. [2021-11-21 00:59:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:59:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-21 00:59:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:23,877 INFO L225 Difference]: With dead ends: 235 [2021-11-21 00:59:23,877 INFO L226 Difference]: Without dead ends: 235 [2021-11-21 00:59:23,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=260, Invalid=3397, Unknown=3, NotChecked=0, Total=3660 [2021-11-21 00:59:23,879 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 236 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:23,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 377 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:59:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-21 00:59:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-11-21 00:59:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 167 states have (on average 1.3712574850299402) internal successors, (229), 192 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 229 transitions. [2021-11-21 00:59:23,885 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 229 transitions. Word has length 26 [2021-11-21 00:59:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:23,885 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 229 transitions. [2021-11-21 00:59:23,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 229 transitions. [2021-11-21 00:59:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:59:23,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:23,886 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:23,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 00:59:24,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:24,095 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:59:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash -285576176, now seen corresponding path program 1 times [2021-11-21 00:59:24,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:24,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746015860] [2021-11-21 00:59:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:24,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:24,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:24,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746015860] [2021-11-21 00:59:24,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746015860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:59:24,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945821342] [2021-11-21 00:59:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:24,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:24,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:24,478 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:24,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:59:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 00:59:24,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:24,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:59:24,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:59:24,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:59:24,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:59:24,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:59:24,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:59:24,737 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-21 00:59:24,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 00:59:24,862 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 00:59:24,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 101 [2021-11-21 00:59:24,890 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-21 00:59:24,890 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 113 treesize of output 88 [2021-11-21 00:59:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2021-11-21 00:59:24,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2021-11-21 00:59:25,374 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-21 00:59:25,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 59 [2021-11-21 00:59:25,387 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-21 00:59:25,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 38 [2021-11-21 00:59:25,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:59:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:25,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:25,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 91 [2021-11-21 00:59:26,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 764 treesize of output 748 [2021-11-21 00:59:26,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 877 treesize of output 873 [2021-11-21 00:59:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:28,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945821342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1974742182] [2021-11-21 00:59:28,409 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 00:59:28,409 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:59:28,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:59:28,410 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:59:28,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:59:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:59:28,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:59:28,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:59:28,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 00:59:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 00:59:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:59:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 00:59:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 00:59:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:28,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 00:59:28,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-21 00:59:28,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 00:59:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,168 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:59:29,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-11-21 00:59:29,223 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:29,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:59:29,259 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:59:29,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-21 00:59:29,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:59:29,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 00:59:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 00:59:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 00:59:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 00:59:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2021-11-21 00:59:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:30,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-11-21 00:59:30,416 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 00:59:30,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 178 [2021-11-21 00:59:30,452 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 00:59:30,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 226 [2021-11-21 00:59:30,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:30,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:30,493 INFO L354 Elim1Store]: treesize reduction 160, result has 14.4 percent of original size [2021-11-21 00:59:30,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 261 treesize of output 258 [2021-11-21 00:59:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:30,924 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-11-21 00:59:30,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 497 treesize of output 438 [2021-11-21 00:59:30,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:30,976 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-11-21 00:59:30,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 478 treesize of output 367 [2021-11-21 00:59:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:31,066 INFO L354 Elim1Store]: treesize reduction 208, result has 19.1 percent of original size [2021-11-21 00:59:31,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 459 treesize of output 461 [2021-11-21 00:59:32,076 INFO L354 Elim1Store]: treesize reduction 324, result has 12.7 percent of original size [2021-11-21 00:59:32,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 439 treesize of output 450 [2021-11-21 00:59:32,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:32,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:32,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:32,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:32,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:33,110 INFO L354 Elim1Store]: treesize reduction 256, result has 13.8 percent of original size [2021-11-21 00:59:33,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 527 treesize of output 513 [2021-11-21 00:59:33,218 INFO L354 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2021-11-21 00:59:33,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 512 treesize of output 405 [2021-11-21 00:59:33,298 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-21 00:59:33,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 472 treesize of output 441 [2021-11-21 00:59:34,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:35,092 INFO L354 Elim1Store]: treesize reduction 180, result has 17.1 percent of original size [2021-11-21 00:59:35,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 836 treesize of output 477 [2021-11-21 00:59:35,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:35,223 INFO L354 Elim1Store]: treesize reduction 204, result has 13.9 percent of original size [2021-11-21 00:59:35,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 711 treesize of output 600 [2021-11-21 00:59:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:35,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:59:35,416 INFO L354 Elim1Store]: treesize reduction 576, result has 10.4 percent of original size [2021-11-21 00:59:35,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 682 treesize of output 657 [2021-11-21 00:59:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:59:37,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:37,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:37,475 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:59:37,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 00:59:37,529 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:59:37,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:59:37,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:59:37,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:59:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:37,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:59:37,798 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:37,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-11-21 00:59:37,816 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:37,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 115 [2021-11-21 00:59:37,834 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 00:59:37,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 100 [2021-11-21 00:59:38,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:59:38,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:38,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 00:59:39,906 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-11-21 00:59:39,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 139 treesize of output 178 [2021-11-21 00:59:40,528 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:59:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:59:40,575 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-21 00:59:40,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2021-11-21 00:59:41,180 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:59:41,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 193 [2021-11-21 00:59:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:59:41,263 INFO L354 Elim1Store]: treesize reduction 80, result has 38.5 percent of original size [2021-11-21 00:59:41,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 193 treesize of output 216 [2021-11-21 00:59:41,294 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:59:41,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 220 [2021-11-21 00:59:42,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:59:42,208 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:59:42,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 59 [2021-11-21 00:59:42,231 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 00:59:42,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 63 [2021-11-21 00:59:42,512 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:59:45,041 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:59:45,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:59:45,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-11-21 00:59:45,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87442867] [2021-11-21 00:59:45,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:45,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 00:59:45,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:45,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 00:59:45,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-11-21 00:59:45,044 INFO L87 Difference]: Start difference. First operand 193 states and 229 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:45,699 INFO L93 Difference]: Finished difference Result 206 states and 243 transitions. [2021-11-21 00:59:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:59:45,700 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 00:59:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:45,701 INFO L225 Difference]: With dead ends: 206 [2021-11-21 00:59:45,701 INFO L226 Difference]: Without dead ends: 206 [2021-11-21 00:59:45,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=330, Invalid=3330, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 00:59:45,703 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 71 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:45,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 745 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 338 Invalid, 0 Unknown, 350 Unchecked, 0.4s Time] [2021-11-21 00:59:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-21 00:59:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2021-11-21 00:59:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 172 states have (on average 1.3662790697674418) internal successors, (235), 197 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 235 transitions. [2021-11-21 00:59:45,710 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 235 transitions. Word has length 27 [2021-11-21 00:59:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:45,710 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 235 transitions. [2021-11-21 00:59:45,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:59:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 235 transitions. [2021-11-21 00:59:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:59:45,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:45,712 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:45,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 00:59:45,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:45,947 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 00:59:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -773489034, now seen corresponding path program 2 times [2021-11-21 00:59:45,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:45,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821494167] [2021-11-21 00:59:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:45,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:46,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821494167] [2021-11-21 00:59:46,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821494167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:59:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172300752] [2021-11-21 00:59:46,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:59:46,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:46,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:46,256 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:46,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:59:46,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:59:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:59:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 00:59:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:46,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:59:46,427 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:59:46,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:59:46,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:59:46,536 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:59:46,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-21 00:59:46,609 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 00:59:46,610 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 42 treesize of output 25 [2021-11-21 00:59:46,650 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:59:46,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:59:46,700 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-21 00:59:46,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2021-11-21 00:59:46,823 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-11-21 00:59:46,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 49 [2021-11-21 00:59:46,954 INFO L354 Elim1Store]: treesize reduction 120, result has 21.1 percent of original size [2021-11-21 00:59:46,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 58 [2021-11-21 00:59:47,472 INFO L354 Elim1Store]: treesize reduction 65, result has 42.5 percent of original size [2021-11-21 00:59:47,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 84 [2021-11-21 00:59:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:47,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:54,155 INFO L354 Elim1Store]: treesize reduction 5, result has 87.8 percent of original size [2021-11-21 00:59:54,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-11-21 01:00:20,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1551744 treesize of output 1547648 [2021-11-21 01:01:42,519 WARN L227 SmtUtils]: Spent 1.37m on a formula simplification. DAG size of input: 1180 DAG size of output: 1180 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:01:42,604 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:01:42,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1538432 treesize of output 1538431 [2021-11-21 01:01:49,596 WARN L227 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 1180 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:01:56,605 WARN L227 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 1173 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:01:56,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:01:56,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155589589] [2021-11-21 01:01:56,628 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 01:01:56,628 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:01:56,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:01:56,628 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:01:56,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:01:56,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:01:56,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-21 01:01:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:01:56,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:01:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 01:01:56,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-21 01:01:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 01:01:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:56,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:01:57,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 01:01:57,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-21 01:01:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 01:01:57,381 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:01:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 01:01:57,406 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:01:57,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-21 01:01:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-21 01:01:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 01:01:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:01:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:01:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:57,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-21 01:01:58,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2021-11-21 01:01:58,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2021-11-21 01:01:58,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 01:01:58,578 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-21 01:01:58,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 160 [2021-11-21 01:01:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:58,614 INFO L354 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2021-11-21 01:01:58,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 224 [2021-11-21 01:01:58,644 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-21 01:01:58,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 212 treesize of output 206 [2021-11-21 01:01:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:59,003 INFO L354 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2021-11-21 01:01:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 451 treesize of output 453 [2021-11-21 01:01:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:59,023 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:01:59,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 458 treesize of output 367 [2021-11-21 01:01:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:59,043 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-21 01:01:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 421 [2021-11-21 01:02:00,039 INFO L354 Elim1Store]: treesize reduction 292, result has 12.8 percent of original size [2021-11-21 01:02:00,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 394 treesize of output 403 [2021-11-21 01:02:01,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:01,195 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-11-21 01:02:01,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 471 treesize of output 392 [2021-11-21 01:02:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:01,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:01,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:01,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:01,320 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-21 01:02:01,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 455 treesize of output 441 [2021-11-21 01:02:01,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:01,393 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-11-21 01:02:01,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 430 [2021-11-21 01:02:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:04,147 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-11-21 01:02:04,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 689 treesize of output 447 [2021-11-21 01:02:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:04,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:04,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:04,390 INFO L354 Elim1Store]: treesize reduction 426, result has 13.2 percent of original size [2021-11-21 01:02:04,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 640 treesize of output 629 [2021-11-21 01:02:04,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:02:04,560 INFO L354 Elim1Store]: treesize reduction 240, result has 17.0 percent of original size [2021-11-21 01:02:04,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 625 treesize of output 613 [2021-11-21 01:02:07,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:02:07,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:02:07,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:02:07,742 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:02:07,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 01:02:07,795 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:02:07,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:02:07,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:02:07,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 01:02:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:07,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:02:08,049 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:02:08,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-11-21 01:02:08,066 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:02:08,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 115 [2021-11-21 01:02:08,084 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:02:08,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 104 [2021-11-21 01:02:08,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:02:08,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:02:08,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-21 01:02:09,514 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:02:09,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-21 01:02:09,584 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:02:09,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:02:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:09,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:09,734 INFO L354 Elim1Store]: treesize reduction 108, result has 31.6 percent of original size [2021-11-21 01:02:09,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 306 treesize of output 329 [2021-11-21 01:02:09,766 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 01:02:09,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 333 [2021-11-21 01:02:09,795 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 01:02:09,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 366 treesize of output 373 [2021-11-21 01:02:13,323 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:02:13,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 349 treesize of output 308 [2021-11-21 01:02:13,406 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-21 01:02:13,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 305 treesize of output 306 [2021-11-21 01:02:13,429 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:02:13,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 280 [2021-11-21 01:02:17,107 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:20,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:20,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:02:20,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-21 01:02:20,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741197609] [2021-11-21 01:02:20,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:20,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:02:20,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:20,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:02:20,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2740, Unknown=16, NotChecked=0, Total=2970 [2021-11-21 01:02:20,295 INFO L87 Difference]: Start difference. First operand 198 states and 235 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:21,711 INFO L93 Difference]: Finished difference Result 255 states and 292 transitions. [2021-11-21 01:02:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:02:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 01:02:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:21,714 INFO L225 Difference]: With dead ends: 255 [2021-11-21 01:02:21,714 INFO L226 Difference]: Without dead ends: 255 [2021-11-21 01:02:21,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=383, Invalid=4713, Unknown=16, NotChecked=0, Total=5112 [2021-11-21 01:02:21,716 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 246 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:21,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 392 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:02:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-21 01:02:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 198. [2021-11-21 01:02:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 172 states have (on average 1.3604651162790697) internal successors, (234), 197 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 234 transitions. [2021-11-21 01:02:21,725 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 234 transitions. Word has length 27 [2021-11-21 01:02:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:21,726 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 234 transitions. [2021-11-21 01:02:21,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:02:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 234 transitions. [2021-11-21 01:02:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:02:21,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:21,727 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:21,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:21,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:21,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 64 more)] === [2021-11-21 01:02:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:21,943 INFO L85 PathProgramCache]: Analyzing trace with hash -773489033, now seen corresponding path program 2 times [2021-11-21 01:02:21,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:21,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91136380] [2021-11-21 01:02:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:21,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:22,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:22,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91136380] [2021-11-21 01:02:22,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91136380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:22,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600008080] [2021-11-21 01:02:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:22,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:22,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:22,523 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:22,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c2b08c-e422-416d-8fa2-209ba7e33630/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:02:22,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:02:22,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-21 01:02:22,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:22,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:02:22,768 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:02:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:02:22,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:02:22,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:02:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:02:22,983 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:02:22,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 01:02:23,003 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:02:23,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 32 [2021-11-21 01:02:23,133 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-11-21 01:02:23,134 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 34 treesize of output 31 [2021-11-21 01:02:23,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:23,161 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-21 01:02:23,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 35 [2021-11-21 01:02:23,262 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-21 01:02:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-21 01:02:23,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 01:02:23,393 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-21 01:02:23,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 43 [2021-11-21 01:02:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:23,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-21 01:02:23,606 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-21 01:02:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 82 [2021-11-21 01:02:23,629 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-21 01:02:23,629 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 117 treesize of output 111 [2021-11-21 01:02:23,801 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-11-21 01:02:23,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 138 [2021-11-21 01:02:23,835 INFO L354 Elim1Store]: treesize reduction 218, result has 13.5 percent of original size [2021-11-21 01:02:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 153 [2021-11-21 01:02:24,378 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-11-21 01:02:24,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 72 [2021-11-21 01:02:24,401 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-11-21 01:02:24,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 44 [2021-11-21 01:02:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:24,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:42,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258602 treesize of output 258026 [2021-11-21 01:02:56,172 WARN L227 SmtUtils]: Spent 13.40s on a formula simplification. DAG size of input: 619 DAG size of output: 609 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:02:56,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118418602 treesize of output 118156458