./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/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_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/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-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:51:26,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:51:26,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:51:26,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:51:26,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:51:26,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:51:26,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:51:26,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:51:26,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:51:26,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:51:26,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:51:26,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:51:26,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:51:26,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:51:26,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:51:26,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:51:26,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:51:26,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:51:26,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:51:26,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:51:26,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:51:26,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:51:26,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:51:26,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:51:26,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:51:26,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:51:26,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:51:26,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:51:26,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:51:26,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:51:26,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:51:26,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:51:26,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:51:26,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:51:26,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:51:26,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:51:26,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:51:26,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:51:26,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:51:26,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:51:26,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:51:26,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:51:26,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:51:26,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:51:26,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:51:26,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:51:26,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:51:26,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:51:26,236 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:51:26,236 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:51:26,236 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:51:26,237 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:51:26,237 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:51:26,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:51:26,237 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:51:26,238 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:51:26,238 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:51:26,238 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:51:26,239 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:51:26,239 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:51:26,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:51:26,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:51:26,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:51:26,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:51:26,241 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:51:26,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:51:26,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:51:26,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:51:26,242 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:51:26,242 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:51:26,243 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:51:26,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:51:26,243 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:51:26,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:51:26,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:51:26,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:51:26,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:51:26,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:51:26,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:51:26,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:51:26,245 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:51:26,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:51:26,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:51:26,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:51:26,246 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_8b5da5cd-6d8b-4ca6-80b7-045962f09130/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2021-11-21 01:51:26,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:51:26,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:51:26,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:51:26,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:51:26,575 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:51:26,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/test-0217.i [2021-11-21 01:51:26,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/data/a151da67f/521458f98f5449849c7aa3827190bcb7/FLAGa089450be [2021-11-21 01:51:27,258 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:51:27,259 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/sv-benchmarks/c/memsafety/test-0217.i [2021-11-21 01:51:27,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/data/a151da67f/521458f98f5449849c7aa3827190bcb7/FLAGa089450be [2021-11-21 01:51:27,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/data/a151da67f/521458f98f5449849c7aa3827190bcb7 [2021-11-21 01:51:27,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:51:27,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:51:27,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:51:27,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:51:27,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:51:27,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:27" (1/1) ... [2021-11-21 01:51:27,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf634f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:27, skipping insertion in model container [2021-11-21 01:51:27,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:27" (1/1) ... [2021-11-21 01:51:27,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:51:27,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:51:28,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:51:28,068 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:51:28,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:51:28,209 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:51:28,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28 WrapperNode [2021-11-21 01:51:28,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:51:28,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:51:28,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:51:28,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:51:28,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,311 INFO L137 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 218 [2021-11-21 01:51:28,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:51:28,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:51:28,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:51:28,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:51:28,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:51:28,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:51:28,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:51:28,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:51:28,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (1/1) ... [2021-11-21 01:51:28,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:51:28,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:28,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:51:28,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:51:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-11-21 01:51:28,476 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-11-21 01:51:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:51:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:51:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:51:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:51:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:51:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:51:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:51:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:51:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:51:28,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:51:28,601 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:51:28,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:51:29,094 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:51:29,169 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:51:29,170 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 01:51:29,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:29 BoogieIcfgContainer [2021-11-21 01:51:29,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:51:29,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:51:29,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:51:29,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:51:29,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:51:27" (1/3) ... [2021-11-21 01:51:29,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb87aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:29, skipping insertion in model container [2021-11-21 01:51:29,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:28" (2/3) ... [2021-11-21 01:51:29,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb87aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:29, skipping insertion in model container [2021-11-21 01:51:29,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:29" (3/3) ... [2021-11-21 01:51:29,181 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0217.i [2021-11-21 01:51:29,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:51:29,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-11-21 01:51:29,234 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:51:29,241 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 01:51:29,241 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-11-21 01:51:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:51:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:51:29,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:29,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:51:29,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 10666821, now seen corresponding path program 1 times [2021-11-21 01:51:29,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:29,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547678824] [2021-11-21 01:51:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:29,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:29,442 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 01:51:29,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547678824] [2021-11-21 01:51:29,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547678824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:29,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:29,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:51:29,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724860652] [2021-11-21 01:51:29,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:29,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:51:29,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:51:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:51:29,488 INFO L87 Difference]: Start difference. First operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 01:51:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:29,593 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2021-11-21 01:51:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:51:29,597 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-21 01:51:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:29,609 INFO L225 Difference]: With dead ends: 138 [2021-11-21 01:51:29,610 INFO L226 Difference]: Without dead ends: 137 [2021-11-21 01:51:29,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:51:29,618 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:29,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-21 01:51:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-21 01:51:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 133 states have internal predecessors, (147), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:51:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-11-21 01:51:29,668 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 4 [2021-11-21 01:51:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:29,668 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-11-21 01:51:29,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 01:51:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-11-21 01:51:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:51:29,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:29,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:51:29,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:51:29,670 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash 322722741, now seen corresponding path program 1 times [2021-11-21 01:51:29,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:29,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631588167] [2021-11-21 01:51:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:29,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:29,750 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 01:51:29,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631588167] [2021-11-21 01:51:29,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631588167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:29,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:29,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 01:51:29,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964564330] [2021-11-21 01:51:29,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:29,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:51:29,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:51:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:51:29,754 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:29,975 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2021-11-21 01:51:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:51:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:51:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:29,979 INFO L225 Difference]: With dead ends: 267 [2021-11-21 01:51:29,980 INFO L226 Difference]: Without dead ends: 267 [2021-11-21 01:51:29,980 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 01:51:29,982 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 135 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:29,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 158 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-21 01:51:29,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2021-11-21 01:51:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 107 states have (on average 2.177570093457944) internal successors, (233), 173 states have internal predecessors, (233), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:51:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 241 transitions. [2021-11-21 01:51:30,003 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 241 transitions. Word has length 5 [2021-11-21 01:51:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:30,003 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 241 transitions. [2021-11-21 01:51:30,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 241 transitions. [2021-11-21 01:51:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:51:30,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:30,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:51:30,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:51:30,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash 322722742, now seen corresponding path program 1 times [2021-11-21 01:51:30,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:30,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46985761] [2021-11-21 01:51:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:30,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:30,166 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 01:51:30,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:30,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46985761] [2021-11-21 01:51:30,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46985761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:30,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:30,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:51:30,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241329898] [2021-11-21 01:51:30,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:30,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:30,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:30,169 INFO L87 Difference]: Start difference. First operand 180 states and 241 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:30,417 INFO L93 Difference]: Finished difference Result 282 states and 361 transitions. [2021-11-21 01:51:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:51:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:30,420 INFO L225 Difference]: With dead ends: 282 [2021-11-21 01:51:30,420 INFO L226 Difference]: Without dead ends: 282 [2021-11-21 01:51:30,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:30,422 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 101 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:30,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 281 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-21 01:51:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 238. [2021-11-21 01:51:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 159 states have (on average 2.0817610062893084) internal successors, (331), 227 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 01:51:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 347 transitions. [2021-11-21 01:51:30,441 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 347 transitions. Word has length 5 [2021-11-21 01:51:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:30,441 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 347 transitions. [2021-11-21 01:51:30,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 347 transitions. [2021-11-21 01:51:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:51:30,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:30,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:30,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:51:30,443 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash 898953628, now seen corresponding path program 1 times [2021-11-21 01:51:30,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:30,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147101166] [2021-11-21 01:51:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:30,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:30,707 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 01:51:30,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:30,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147101166] [2021-11-21 01:51:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147101166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:30,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:30,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:30,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782362721] [2021-11-21 01:51:30,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:30,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:30,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:30,710 INFO L87 Difference]: Start difference. First operand 238 states and 347 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:31,012 INFO L93 Difference]: Finished difference Result 336 states and 468 transitions. [2021-11-21 01:51:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:51:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:31,016 INFO L225 Difference]: With dead ends: 336 [2021-11-21 01:51:31,016 INFO L226 Difference]: Without dead ends: 336 [2021-11-21 01:51:31,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:51:31,018 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 98 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:31,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 452 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-21 01:51:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 271. [2021-11-21 01:51:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 189 states have (on average 2.0476190476190474) internal successors, (387), 258 states have internal predecessors, (387), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 407 transitions. [2021-11-21 01:51:31,043 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 407 transitions. Word has length 7 [2021-11-21 01:51:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:31,044 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 407 transitions. [2021-11-21 01:51:31,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 407 transitions. [2021-11-21 01:51:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:51:31,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:31,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:31,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:51:31,045 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash 898955471, now seen corresponding path program 1 times [2021-11-21 01:51:31,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:31,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422235087] [2021-11-21 01:51:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:31,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:31,110 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 01:51:31,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422235087] [2021-11-21 01:51:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422235087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:31,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:31,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 01:51:31,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278687955] [2021-11-21 01:51:31,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:31,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:51:31,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:51:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:51:31,112 INFO L87 Difference]: Start difference. First operand 271 states and 407 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:31,250 INFO L93 Difference]: Finished difference Result 318 states and 450 transitions. [2021-11-21 01:51:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:51:31,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:51:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:31,257 INFO L225 Difference]: With dead ends: 318 [2021-11-21 01:51:31,257 INFO L226 Difference]: Without dead ends: 314 [2021-11-21 01:51:31,258 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 01:51:31,261 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 58 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:31,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 186 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-21 01:51:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 269. [2021-11-21 01:51:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 187 states have (on average 2.053475935828877) internal successors, (384), 256 states have internal predecessors, (384), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 404 transitions. [2021-11-21 01:51:31,285 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 404 transitions. Word has length 7 [2021-11-21 01:51:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:31,285 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 404 transitions. [2021-11-21 01:51:31,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 404 transitions. [2021-11-21 01:51:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:51:31,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:31,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:31,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:51:31,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash -544673918, now seen corresponding path program 1 times [2021-11-21 01:51:31,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:31,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425305118] [2021-11-21 01:51:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:31,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:31,381 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 01:51:31,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:31,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425305118] [2021-11-21 01:51:31,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425305118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:31,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:31,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:51:31,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533748189] [2021-11-21 01:51:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:31,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:31,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:31,384 INFO L87 Difference]: Start difference. First operand 269 states and 404 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:31,735 INFO L93 Difference]: Finished difference Result 471 states and 577 transitions. [2021-11-21 01:51:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:51:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-21 01:51:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:31,740 INFO L225 Difference]: With dead ends: 471 [2021-11-21 01:51:31,741 INFO L226 Difference]: Without dead ends: 471 [2021-11-21 01:51:31,741 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 01:51:31,752 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 384 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:31,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 277 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:51:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-21 01:51:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2021-11-21 01:51:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 188 states have (on average 2.0106382978723403) internal successors, (378), 253 states have internal predecessors, (378), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 398 transitions. [2021-11-21 01:51:31,766 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 398 transitions. Word has length 10 [2021-11-21 01:51:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:31,766 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 398 transitions. [2021-11-21 01:51:31,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 398 transitions. [2021-11-21 01:51:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:51:31,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:31,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:31,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:51:31,768 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash -544673917, now seen corresponding path program 1 times [2021-11-21 01:51:31,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:31,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946302644] [2021-11-21 01:51:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:31,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:31,972 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 01:51:31,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946302644] [2021-11-21 01:51:31,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946302644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:31,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:31,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:31,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318434207] [2021-11-21 01:51:31,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:31,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:51:31,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:51:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:31,979 INFO L87 Difference]: Start difference. First operand 266 states and 398 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:32,859 INFO L93 Difference]: Finished difference Result 564 states and 712 transitions. [2021-11-21 01:51:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:51:32,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-21 01:51:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:32,863 INFO L225 Difference]: With dead ends: 564 [2021-11-21 01:51:32,863 INFO L226 Difference]: Without dead ends: 564 [2021-11-21 01:51:32,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:51:32,864 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 499 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:32,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 384 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:51:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-21 01:51:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 281. [2021-11-21 01:51:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 203 states have (on average 2.0098522167487687) internal successors, (408), 268 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 428 transitions. [2021-11-21 01:51:32,883 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 428 transitions. Word has length 10 [2021-11-21 01:51:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:32,883 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 428 transitions. [2021-11-21 01:51:32,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 428 transitions. [2021-11-21 01:51:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:51:32,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:32,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:32,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:51:32,885 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:32,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1966487762, now seen corresponding path program 1 times [2021-11-21 01:51:32,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:32,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119228241] [2021-11-21 01:51:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:32,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:32,955 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 01:51:32,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119228241] [2021-11-21 01:51:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119228241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:32,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:32,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:51:32,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593492798] [2021-11-21 01:51:32,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:32,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:32,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:32,960 INFO L87 Difference]: Start difference. First operand 281 states and 428 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:33,247 INFO L93 Difference]: Finished difference Result 477 states and 646 transitions. [2021-11-21 01:51:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:33,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-21 01:51:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:33,252 INFO L225 Difference]: With dead ends: 477 [2021-11-21 01:51:33,252 INFO L226 Difference]: Without dead ends: 477 [2021-11-21 01:51:33,252 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 01:51:33,253 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 250 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:33,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 272 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:51:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-21 01:51:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 287. [2021-11-21 01:51:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 209 states have (on average 1.9808612440191387) internal successors, (414), 274 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 434 transitions. [2021-11-21 01:51:33,266 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 434 transitions. Word has length 12 [2021-11-21 01:51:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:33,266 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 434 transitions. [2021-11-21 01:51:33,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 434 transitions. [2021-11-21 01:51:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:51:33,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:33,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:33,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:51:33,268 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1966487761, now seen corresponding path program 1 times [2021-11-21 01:51:33,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:33,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209422831] [2021-11-21 01:51:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:33,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:33,324 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 01:51:33,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209422831] [2021-11-21 01:51:33,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209422831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:33,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:33,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:51:33,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244070357] [2021-11-21 01:51:33,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:33,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:33,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:33,326 INFO L87 Difference]: Start difference. First operand 287 states and 434 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:33,551 INFO L93 Difference]: Finished difference Result 338 states and 453 transitions. [2021-11-21 01:51:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-21 01:51:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:33,554 INFO L225 Difference]: With dead ends: 338 [2021-11-21 01:51:33,554 INFO L226 Difference]: Without dead ends: 338 [2021-11-21 01:51:33,554 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 01:51:33,555 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 160 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:33,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 278 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-21 01:51:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 287. [2021-11-21 01:51:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 209 states have (on average 1.937799043062201) internal successors, (405), 274 states have internal predecessors, (405), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 425 transitions. [2021-11-21 01:51:33,566 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 425 transitions. Word has length 12 [2021-11-21 01:51:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:33,567 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 425 transitions. [2021-11-21 01:51:33,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 425 transitions. [2021-11-21 01:51:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:51:33,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:33,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:33,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:51:33,568 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash 13826545, now seen corresponding path program 1 times [2021-11-21 01:51:33,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:33,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790921446] [2021-11-21 01:51:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:33,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:33,907 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 01:51:33,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790921446] [2021-11-21 01:51:33,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790921446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:33,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:33,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:51:33,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703124444] [2021-11-21 01:51:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:33,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:51:33,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:33,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:51:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:33,912 INFO L87 Difference]: Start difference. First operand 287 states and 425 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:34,315 INFO L93 Difference]: Finished difference Result 352 states and 497 transitions. [2021-11-21 01:51:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:51:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-21 01:51:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:34,322 INFO L225 Difference]: With dead ends: 352 [2021-11-21 01:51:34,322 INFO L226 Difference]: Without dead ends: 352 [2021-11-21 01:51:34,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:51:34,324 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 166 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:34,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 294 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:51:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-21 01:51:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 290. [2021-11-21 01:51:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 212 states have (on average 1.9245283018867925) internal successors, (408), 276 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 428 transitions. [2021-11-21 01:51:34,339 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 428 transitions. Word has length 13 [2021-11-21 01:51:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:34,340 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 428 transitions. [2021-11-21 01:51:34,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 428 transitions. [2021-11-21 01:51:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:51:34,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:34,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:34,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:51:34,341 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash 418936595, now seen corresponding path program 1 times [2021-11-21 01:51:34,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:34,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819902463] [2021-11-21 01:51:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:34,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:34,460 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 01:51:34,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819902463] [2021-11-21 01:51:34,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819902463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:34,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:34,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:34,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927551554] [2021-11-21 01:51:34,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:34,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:34,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:34,462 INFO L87 Difference]: Start difference. First operand 290 states and 428 transitions. Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:34,672 INFO L93 Difference]: Finished difference Result 328 states and 435 transitions. [2021-11-21 01:51:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-21 01:51:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:34,675 INFO L225 Difference]: With dead ends: 328 [2021-11-21 01:51:34,675 INFO L226 Difference]: Without dead ends: 328 [2021-11-21 01:51:34,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:34,676 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 186 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:34,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 468 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-21 01:51:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 288. [2021-11-21 01:51:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 212 states have (on average 1.8962264150943395) internal successors, (402), 274 states have internal predecessors, (402), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 422 transitions. [2021-11-21 01:51:34,686 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 422 transitions. Word has length 15 [2021-11-21 01:51:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:34,686 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 422 transitions. [2021-11-21 01:51:34,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 422 transitions. [2021-11-21 01:51:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:51:34,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:34,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:34,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:51:34,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash 418936594, now seen corresponding path program 1 times [2021-11-21 01:51:34,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:34,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079643167] [2021-11-21 01:51:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:34,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:34,710 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 01:51:34,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079643167] [2021-11-21 01:51:34,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079643167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:34,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:34,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:51:34,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641081742] [2021-11-21 01:51:34,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:34,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:51:34,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:51:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:51:34,713 INFO L87 Difference]: Start difference. First operand 288 states and 422 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:34,843 INFO L93 Difference]: Finished difference Result 361 states and 497 transitions. [2021-11-21 01:51:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:51:34,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-21 01:51:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:34,846 INFO L225 Difference]: With dead ends: 361 [2021-11-21 01:51:34,846 INFO L226 Difference]: Without dead ends: 361 [2021-11-21 01:51:34,847 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 01:51:34,847 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 120 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:34,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 186 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-21 01:51:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 285. [2021-11-21 01:51:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 212 states have (on average 1.8537735849056605) internal successors, (393), 271 states have internal predecessors, (393), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 413 transitions. [2021-11-21 01:51:34,858 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 413 transitions. Word has length 15 [2021-11-21 01:51:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:34,858 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 413 transitions. [2021-11-21 01:51:34,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 413 transitions. [2021-11-21 01:51:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:51:34,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:34,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:34,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:51:34,859 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 418938414, now seen corresponding path program 1 times [2021-11-21 01:51:34,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135541693] [2021-11-21 01:51:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:34,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:34,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:34,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135541693] [2021-11-21 01:51:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135541693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:34,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:34,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:34,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853071284] [2021-11-21 01:51:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:34,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:34,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:34,885 INFO L87 Difference]: Start difference. First operand 285 states and 413 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:34,939 INFO L93 Difference]: Finished difference Result 291 states and 419 transitions. [2021-11-21 01:51:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-21 01:51:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:34,943 INFO L225 Difference]: With dead ends: 291 [2021-11-21 01:51:34,943 INFO L226 Difference]: Without dead ends: 291 [2021-11-21 01:51:34,943 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 01:51:34,944 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:34,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 350 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:51:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-21 01:51:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2021-11-21 01:51:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 218 states have (on average 1.8302752293577982) internal successors, (399), 277 states have internal predecessors, (399), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 419 transitions. [2021-11-21 01:51:34,953 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 419 transitions. Word has length 15 [2021-11-21 01:51:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:34,953 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 419 transitions. [2021-11-21 01:51:34,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 419 transitions. [2021-11-21 01:51:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:51:34,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:34,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:34,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:51:34,954 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash -35759209, now seen corresponding path program 1 times [2021-11-21 01:51:34,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665479712] [2021-11-21 01:51:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:34,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:35,152 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 01:51:35,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665479712] [2021-11-21 01:51:35,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665479712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:35,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:35,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:51:35,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176867485] [2021-11-21 01:51:35,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:35,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:51:35,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:51:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:51:35,155 INFO L87 Difference]: Start difference. First operand 291 states and 419 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:35,630 INFO L93 Difference]: Finished difference Result 500 states and 676 transitions. [2021-11-21 01:51:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:51:35,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-21 01:51:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:35,634 INFO L225 Difference]: With dead ends: 500 [2021-11-21 01:51:35,634 INFO L226 Difference]: Without dead ends: 498 [2021-11-21 01:51:35,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:51:35,635 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 285 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:35,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 803 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:51:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-21 01:51:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 285. [2021-11-21 01:51:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 212 states have (on average 1.830188679245283) internal successors, (388), 271 states have internal predecessors, (388), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 408 transitions. [2021-11-21 01:51:35,646 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 408 transitions. Word has length 16 [2021-11-21 01:51:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:35,647 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 408 transitions. [2021-11-21 01:51:35,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 408 transitions. [2021-11-21 01:51:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:51:35,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:35,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:35,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:51:35,648 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1108155252, now seen corresponding path program 1 times [2021-11-21 01:51:35,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:35,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090599462] [2021-11-21 01:51:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:35,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:35,681 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 01:51:35,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090599462] [2021-11-21 01:51:35,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090599462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:35,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:35,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:51:35,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775280481] [2021-11-21 01:51:35,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:35,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:51:35,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:51:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:51:35,683 INFO L87 Difference]: Start difference. First operand 285 states and 408 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:35,939 INFO L93 Difference]: Finished difference Result 467 states and 607 transitions. [2021-11-21 01:51:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-21 01:51:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:35,943 INFO L225 Difference]: With dead ends: 467 [2021-11-21 01:51:35,943 INFO L226 Difference]: Without dead ends: 467 [2021-11-21 01:51:35,943 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 01:51:35,944 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 225 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:35,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 272 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-21 01:51:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 301. [2021-11-21 01:51:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 228 states have (on average 1.8596491228070176) internal successors, (424), 287 states have internal predecessors, (424), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 444 transitions. [2021-11-21 01:51:35,955 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 444 transitions. Word has length 17 [2021-11-21 01:51:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:35,955 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 444 transitions. [2021-11-21 01:51:35,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 444 transitions. [2021-11-21 01:51:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:51:35,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:35,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:35,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:51:35,957 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1108155251, now seen corresponding path program 1 times [2021-11-21 01:51:35,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:35,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41333303] [2021-11-21 01:51:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:35,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:36,036 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 01:51:36,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:36,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41333303] [2021-11-21 01:51:36,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41333303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:36,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:36,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:36,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024657950] [2021-11-21 01:51:36,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:36,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:36,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:36,039 INFO L87 Difference]: Start difference. First operand 301 states and 444 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:36,242 INFO L93 Difference]: Finished difference Result 348 states and 462 transitions. [2021-11-21 01:51:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:51:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-21 01:51:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:36,245 INFO L225 Difference]: With dead ends: 348 [2021-11-21 01:51:36,245 INFO L226 Difference]: Without dead ends: 348 [2021-11-21 01:51:36,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:36,246 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 226 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:36,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 272 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-21 01:51:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 301. [2021-11-21 01:51:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 228 states have (on average 1.8201754385964912) internal successors, (415), 287 states have internal predecessors, (415), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 435 transitions. [2021-11-21 01:51:36,256 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 435 transitions. Word has length 17 [2021-11-21 01:51:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:36,257 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 435 transitions. [2021-11-21 01:51:36,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 435 transitions. [2021-11-21 01:51:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:51:36,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:36,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:36,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:51:36,258 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1128856781, now seen corresponding path program 1 times [2021-11-21 01:51:36,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11655037] [2021-11-21 01:51:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:36,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:36,306 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 01:51:36,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11655037] [2021-11-21 01:51:36,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11655037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:36,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:36,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:36,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792842901] [2021-11-21 01:51:36,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:36,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:36,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:36,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:36,309 INFO L87 Difference]: Start difference. First operand 301 states and 435 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:36,461 INFO L93 Difference]: Finished difference Result 461 states and 644 transitions. [2021-11-21 01:51:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-21 01:51:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:36,465 INFO L225 Difference]: With dead ends: 461 [2021-11-21 01:51:36,465 INFO L226 Difference]: Without dead ends: 461 [2021-11-21 01:51:36,465 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 01:51:36,466 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 126 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:36,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 426 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-21 01:51:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 319. [2021-11-21 01:51:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 246 states have (on average 1.7804878048780488) internal successors, (438), 305 states have internal predecessors, (438), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 458 transitions. [2021-11-21 01:51:36,474 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 458 transitions. Word has length 17 [2021-11-21 01:51:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:36,474 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 458 transitions. [2021-11-21 01:51:36,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 458 transitions. [2021-11-21 01:51:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:51:36,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:36,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:36,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:51:36,476 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1128856587, now seen corresponding path program 1 times [2021-11-21 01:51:36,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:36,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164025188] [2021-11-21 01:51:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:36,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:36,570 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 01:51:36,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:36,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164025188] [2021-11-21 01:51:36,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164025188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:36,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:36,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:36,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811690806] [2021-11-21 01:51:36,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:36,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:36,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:36,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:36,573 INFO L87 Difference]: Start difference. First operand 319 states and 458 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:36,775 INFO L93 Difference]: Finished difference Result 355 states and 465 transitions. [2021-11-21 01:51:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-21 01:51:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:36,778 INFO L225 Difference]: With dead ends: 355 [2021-11-21 01:51:36,778 INFO L226 Difference]: Without dead ends: 355 [2021-11-21 01:51:36,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:36,779 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 176 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:36,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 459 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-21 01:51:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 318. [2021-11-21 01:51:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7560975609756098) internal successors, (432), 304 states have internal predecessors, (432), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 452 transitions. [2021-11-21 01:51:36,791 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 452 transitions. Word has length 17 [2021-11-21 01:51:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:36,793 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 452 transitions. [2021-11-21 01:51:36,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 452 transitions. [2021-11-21 01:51:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:51:36,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:36,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:36,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:51:36,794 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1934302113, now seen corresponding path program 1 times [2021-11-21 01:51:36,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308708474] [2021-11-21 01:51:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:36,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:37,001 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 01:51:37,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308708474] [2021-11-21 01:51:37,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308708474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:37,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:37,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:51:37,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984072309] [2021-11-21 01:51:37,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:37,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:51:37,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:51:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:37,005 INFO L87 Difference]: Start difference. First operand 318 states and 452 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:37,614 INFO L93 Difference]: Finished difference Result 479 states and 649 transitions. [2021-11-21 01:51:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:51:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-21 01:51:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:37,618 INFO L225 Difference]: With dead ends: 479 [2021-11-21 01:51:37,618 INFO L226 Difference]: Without dead ends: 479 [2021-11-21 01:51:37,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:51:37,619 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 543 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:37,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 712 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:51:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-21 01:51:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 315. [2021-11-21 01:51:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.7154471544715446) internal successors, (422), 301 states have internal predecessors, (422), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 442 transitions. [2021-11-21 01:51:37,630 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 442 transitions. Word has length 20 [2021-11-21 01:51:37,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:37,631 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 442 transitions. [2021-11-21 01:51:37,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 442 transitions. [2021-11-21 01:51:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:51:37,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:37,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:37,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:51:37,632 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash 166179431, now seen corresponding path program 1 times [2021-11-21 01:51:37,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:37,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85337542] [2021-11-21 01:51:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:37,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:37,792 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 01:51:37,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:37,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85337542] [2021-11-21 01:51:37,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85337542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:37,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:37,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:51:37,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657592677] [2021-11-21 01:51:37,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:37,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:51:37,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:51:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:37,794 INFO L87 Difference]: Start difference. First operand 315 states and 442 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:38,078 INFO L93 Difference]: Finished difference Result 365 states and 481 transitions. [2021-11-21 01:51:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-21 01:51:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:38,080 INFO L225 Difference]: With dead ends: 365 [2021-11-21 01:51:38,080 INFO L226 Difference]: Without dead ends: 365 [2021-11-21 01:51:38,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:51:38,081 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 113 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:38,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 553 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-21 01:51:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 311. [2021-11-21 01:51:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 242 states have (on average 1.7024793388429753) internal successors, (412), 297 states have internal predecessors, (412), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 432 transitions. [2021-11-21 01:51:38,091 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 432 transitions. Word has length 21 [2021-11-21 01:51:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:38,091 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 432 transitions. [2021-11-21 01:51:38,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 432 transitions. [2021-11-21 01:51:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:51:38,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:38,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:38,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:51:38,093 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:38,094 INFO L85 PathProgramCache]: Analyzing trace with hash 166046867, now seen corresponding path program 1 times [2021-11-21 01:51:38,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:38,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438141313] [2021-11-21 01:51:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:38,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:38,155 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 01:51:38,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:38,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438141313] [2021-11-21 01:51:38,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438141313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:38,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:38,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:38,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783470695] [2021-11-21 01:51:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:38,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:38,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:38,159 INFO L87 Difference]: Start difference. First operand 311 states and 432 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:38,336 INFO L93 Difference]: Finished difference Result 364 states and 480 transitions. [2021-11-21 01:51:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-21 01:51:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:38,339 INFO L225 Difference]: With dead ends: 364 [2021-11-21 01:51:38,339 INFO L226 Difference]: Without dead ends: 364 [2021-11-21 01:51:38,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:51:38,340 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 113 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:38,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 442 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-21 01:51:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 311. [2021-11-21 01:51:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 297 states have internal predecessors, (411), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 431 transitions. [2021-11-21 01:51:38,350 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 431 transitions. Word has length 21 [2021-11-21 01:51:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:38,351 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 431 transitions. [2021-11-21 01:51:38,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 431 transitions. [2021-11-21 01:51:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:51:38,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:38,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:38,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 01:51:38,352 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash -858315806, now seen corresponding path program 1 times [2021-11-21 01:51:38,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:38,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492482487] [2021-11-21 01:51:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:38,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:38,386 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 01:51:38,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492482487] [2021-11-21 01:51:38,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492482487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:38,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:38,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:38,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744341094] [2021-11-21 01:51:38,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:38,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:38,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:38,388 INFO L87 Difference]: Start difference. First operand 311 states and 431 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:38,592 INFO L93 Difference]: Finished difference Result 383 states and 510 transitions. [2021-11-21 01:51:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:51:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-21 01:51:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:38,597 INFO L225 Difference]: With dead ends: 383 [2021-11-21 01:51:38,597 INFO L226 Difference]: Without dead ends: 383 [2021-11-21 01:51:38,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:51:38,598 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 299 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:38,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-21 01:51:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 310. [2021-11-21 01:51:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 242 states have (on average 1.6900826446280992) internal successors, (409), 296 states have internal predecessors, (409), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 429 transitions. [2021-11-21 01:51:38,608 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 429 transitions. Word has length 21 [2021-11-21 01:51:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:38,608 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 429 transitions. [2021-11-21 01:51:38,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 429 transitions. [2021-11-21 01:51:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:51:38,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:38,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:38,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 01:51:38,610 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash -858315805, now seen corresponding path program 1 times [2021-11-21 01:51:38,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:38,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804147613] [2021-11-21 01:51:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:38,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:38,674 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 01:51:38,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:38,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804147613] [2021-11-21 01:51:38,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804147613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:38,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:38,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:38,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631761781] [2021-11-21 01:51:38,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:38,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:38,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:38,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:38,676 INFO L87 Difference]: Start difference. First operand 310 states and 429 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:38,852 INFO L93 Difference]: Finished difference Result 344 states and 440 transitions. [2021-11-21 01:51:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:51:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-21 01:51:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:38,854 INFO L225 Difference]: With dead ends: 344 [2021-11-21 01:51:38,855 INFO L226 Difference]: Without dead ends: 344 [2021-11-21 01:51:38,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:51:38,855 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 321 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:38,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 336 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:38,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-21 01:51:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 309. [2021-11-21 01:51:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.6818181818181819) internal successors, (407), 295 states have internal predecessors, (407), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:51:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 427 transitions. [2021-11-21 01:51:38,866 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 427 transitions. Word has length 21 [2021-11-21 01:51:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:38,867 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 427 transitions. [2021-11-21 01:51:38,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 427 transitions. [2021-11-21 01:51:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:51:38,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:38,868 INFO L514 BasicCegarLoop]: trace histogram [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 01:51:38,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 01:51:38,869 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash 852485823, now seen corresponding path program 1 times [2021-11-21 01:51:38,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:38,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778223138] [2021-11-21 01:51:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:38,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:38,959 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 01:51:38,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:38,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778223138] [2021-11-21 01:51:38,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778223138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:38,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:38,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:38,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230931929] [2021-11-21 01:51:38,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:38,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:38,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:38,962 INFO L87 Difference]: Start difference. First operand 309 states and 427 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:39,187 INFO L93 Difference]: Finished difference Result 415 states and 546 transitions. [2021-11-21 01:51:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:51:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-21 01:51:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:39,190 INFO L225 Difference]: With dead ends: 415 [2021-11-21 01:51:39,190 INFO L226 Difference]: Without dead ends: 415 [2021-11-21 01:51:39,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:51:39,191 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 156 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:39,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 412 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-21 01:51:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 339. [2021-11-21 01:51:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 269 states have (on average 1.6691449814126393) internal successors, (449), 323 states have internal predecessors, (449), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 01:51:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2021-11-21 01:51:39,201 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 22 [2021-11-21 01:51:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:39,201 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2021-11-21 01:51:39,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2021-11-21 01:51:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:51:39,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:39,202 INFO L514 BasicCegarLoop]: trace histogram [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 01:51:39,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-21 01:51:39,203 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash -207765373, now seen corresponding path program 1 times [2021-11-21 01:51:39,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862702808] [2021-11-21 01:51:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:39,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:39,242 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 01:51:39,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862702808] [2021-11-21 01:51:39,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862702808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:39,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:39,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:39,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422599162] [2021-11-21 01:51:39,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:39,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:39,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:39,244 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:39,508 INFO L93 Difference]: Finished difference Result 642 states and 829 transitions. [2021-11-21 01:51:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:51:39,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-21 01:51:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:39,512 INFO L225 Difference]: With dead ends: 642 [2021-11-21 01:51:39,512 INFO L226 Difference]: Without dead ends: 642 [2021-11-21 01:51:39,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:39,513 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 414 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:39,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 408 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-21 01:51:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 336. [2021-11-21 01:51:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 269 states have (on average 1.6468401486988848) internal successors, (443), 320 states have internal predecessors, (443), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 01:51:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2021-11-21 01:51:39,548 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 23 [2021-11-21 01:51:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:39,549 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2021-11-21 01:51:39,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2021-11-21 01:51:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:51:39,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:39,551 INFO L514 BasicCegarLoop]: trace histogram [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 01:51:39,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-21 01:51:39,551 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash -207765372, now seen corresponding path program 1 times [2021-11-21 01:51:39,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845107730] [2021-11-21 01:51:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:39,653 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 01:51:39,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:39,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845107730] [2021-11-21 01:51:39,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845107730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:39,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:39,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:39,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115772866] [2021-11-21 01:51:39,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:39,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:51:39,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:51:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:39,656 INFO L87 Difference]: Start difference. First operand 336 states and 467 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:39,940 INFO L93 Difference]: Finished difference Result 529 states and 676 transitions. [2021-11-21 01:51:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-21 01:51:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:39,944 INFO L225 Difference]: With dead ends: 529 [2021-11-21 01:51:39,944 INFO L226 Difference]: Without dead ends: 529 [2021-11-21 01:51:39,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:51:39,945 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 612 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:39,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 416 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-21 01:51:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 335. [2021-11-21 01:51:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 269 states have (on average 1.6394052044609666) internal successors, (441), 319 states have internal predecessors, (441), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 01:51:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 465 transitions. [2021-11-21 01:51:39,964 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 465 transitions. Word has length 23 [2021-11-21 01:51:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:39,964 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 465 transitions. [2021-11-21 01:51:39,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 465 transitions. [2021-11-21 01:51:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:51:39,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:39,965 INFO L514 BasicCegarLoop]: trace histogram [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 01:51:39,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-21 01:51:39,965 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash -207765211, now seen corresponding path program 1 times [2021-11-21 01:51:39,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:39,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014122433] [2021-11-21 01:51:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:39,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:40,063 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 01:51:40,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:40,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014122433] [2021-11-21 01:51:40,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014122433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:40,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:40,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:51:40,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442338404] [2021-11-21 01:51:40,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:40,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:40,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:40,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:40,066 INFO L87 Difference]: Start difference. First operand 335 states and 465 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:40,386 INFO L93 Difference]: Finished difference Result 463 states and 577 transitions. [2021-11-21 01:51:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:51:40,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-21 01:51:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:40,389 INFO L225 Difference]: With dead ends: 463 [2021-11-21 01:51:40,389 INFO L226 Difference]: Without dead ends: 463 [2021-11-21 01:51:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:40,390 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 464 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:40,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 268 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:51:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-21 01:51:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 335. [2021-11-21 01:51:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 269 states have (on average 1.6319702602230484) internal successors, (439), 319 states have internal predecessors, (439), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 01:51:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 463 transitions. [2021-11-21 01:51:40,409 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 463 transitions. Word has length 23 [2021-11-21 01:51:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:40,409 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 463 transitions. [2021-11-21 01:51:40,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 463 transitions. [2021-11-21 01:51:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:51:40,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:40,410 INFO L514 BasicCegarLoop]: trace histogram [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 01:51:40,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-21 01:51:40,411 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1099869823, now seen corresponding path program 1 times [2021-11-21 01:51:40,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:40,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46897112] [2021-11-21 01:51:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:40,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:40,533 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 01:51:40,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46897112] [2021-11-21 01:51:40,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46897112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:40,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:40,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:40,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2366890] [2021-11-21 01:51:40,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:40,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:51:40,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:51:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:40,535 INFO L87 Difference]: Start difference. First operand 335 states and 463 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:41,075 INFO L93 Difference]: Finished difference Result 614 states and 811 transitions. [2021-11-21 01:51:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:51:41,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-21 01:51:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:41,080 INFO L225 Difference]: With dead ends: 614 [2021-11-21 01:51:41,080 INFO L226 Difference]: Without dead ends: 614 [2021-11-21 01:51:41,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:51:41,081 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 326 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:41,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 587 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:51:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-21 01:51:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 364. [2021-11-21 01:51:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 295 states have (on average 1.6101694915254237) internal successors, (475), 346 states have internal predecessors, (475), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-21 01:51:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 503 transitions. [2021-11-21 01:51:41,092 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 503 transitions. Word has length 24 [2021-11-21 01:51:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:41,093 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 503 transitions. [2021-11-21 01:51:41,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 503 transitions. [2021-11-21 01:51:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:51:41,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:41,094 INFO L514 BasicCegarLoop]: trace histogram [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 01:51:41,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-21 01:51:41,094 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash 263774103, now seen corresponding path program 1 times [2021-11-21 01:51:41,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:41,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30823579] [2021-11-21 01:51:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:41,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:41,216 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 01:51:41,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:41,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30823579] [2021-11-21 01:51:41,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30823579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:41,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:41,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:51:41,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357882011] [2021-11-21 01:51:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:41,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:51:41,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:51:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:51:41,219 INFO L87 Difference]: Start difference. First operand 364 states and 503 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:41,535 INFO L93 Difference]: Finished difference Result 415 states and 533 transitions. [2021-11-21 01:51:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:51:41,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-21 01:51:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:41,538 INFO L225 Difference]: With dead ends: 415 [2021-11-21 01:51:41,538 INFO L226 Difference]: Without dead ends: 415 [2021-11-21 01:51:41,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:51:41,539 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 355 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:41,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 415 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-21 01:51:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 364. [2021-11-21 01:51:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 295 states have (on average 1.5966101694915253) internal successors, (471), 346 states have internal predecessors, (471), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-21 01:51:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 499 transitions. [2021-11-21 01:51:41,550 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 499 transitions. Word has length 25 [2021-11-21 01:51:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:41,550 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 499 transitions. [2021-11-21 01:51:41,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 499 transitions. [2021-11-21 01:51:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:51:41,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:41,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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 01:51:41,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-21 01:51:41,552 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash -693482083, now seen corresponding path program 1 times [2021-11-21 01:51:41,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108310787] [2021-11-21 01:51:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:41,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:41,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108310787] [2021-11-21 01:51:41,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108310787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:51:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600988023] [2021-11-21 01:51:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:41,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:41,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:41,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:51:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:51:41,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:42,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:42,134 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:51:42,135 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 12 treesize of output 11 [2021-11-21 01:51:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:42,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600988023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434798306] [2021-11-21 01:51:42,215 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-21 01:51:42,215 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:51:42,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:51:42,226 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:51:42,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:51:46,744 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 54 for LOIs [2021-11-21 01:51:46,838 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:51:48,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [434798306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:48,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:51:48,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2021-11-21 01:51:48,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743570268] [2021-11-21 01:51:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:48,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:51:48,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:51:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:51:48,093 INFO L87 Difference]: Start difference. First operand 364 states and 499 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:48,858 INFO L93 Difference]: Finished difference Result 236 states and 301 transitions. [2021-11-21 01:51:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:51:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-21 01:51:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:48,859 INFO L225 Difference]: With dead ends: 236 [2021-11-21 01:51:48,860 INFO L226 Difference]: Without dead ends: 236 [2021-11-21 01:51:48,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:51:48,861 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 20 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:48,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 339 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:51:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-21 01:51:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-11-21 01:51:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 175 states have (on average 1.6285714285714286) internal successors, (285), 222 states have internal predecessors, (285), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:51:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 297 transitions. [2021-11-21 01:51:48,867 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 297 transitions. Word has length 34 [2021-11-21 01:51:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:48,868 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 297 transitions. [2021-11-21 01:51:48,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 297 transitions. [2021-11-21 01:51:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:51:48,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:48,869 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2021-11-21 01:51:48,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:51:49,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:49,083 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1500411260, now seen corresponding path program 1 times [2021-11-21 01:51:49,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875047526] [2021-11-21 01:51:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:49,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:49,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:49,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875047526] [2021-11-21 01:51:49,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875047526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:49,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:49,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:49,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615982921] [2021-11-21 01:51:49,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:49,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:51:49,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:51:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:49,240 INFO L87 Difference]: Start difference. First operand 232 states and 297 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:49,417 INFO L93 Difference]: Finished difference Result 230 states and 294 transitions. [2021-11-21 01:51:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:49,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-11-21 01:51:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:49,419 INFO L225 Difference]: With dead ends: 230 [2021-11-21 01:51:49,419 INFO L226 Difference]: Without dead ends: 230 [2021-11-21 01:51:49,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:49,420 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 224 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:49,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 186 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:51:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-21 01:51:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-21 01:51:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 175 states have (on average 1.6114285714285714) internal successors, (282), 220 states have internal predecessors, (282), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:51:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 294 transitions. [2021-11-21 01:51:49,426 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 294 transitions. Word has length 33 [2021-11-21 01:51:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:49,427 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 294 transitions. [2021-11-21 01:51:49,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:51:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 294 transitions. [2021-11-21 01:51:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:51:49,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:49,428 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2021-11-21 01:51:49,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-21 01:51:49,428 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1074116332, now seen corresponding path program 1 times [2021-11-21 01:51:49,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086631732] [2021-11-21 01:51:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:49,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:49,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:49,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086631732] [2021-11-21 01:51:49,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086631732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:49,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:49,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:49,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266262076] [2021-11-21 01:51:49,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:49,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:51:49,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:51:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:51:49,507 INFO L87 Difference]: Start difference. First operand 230 states and 294 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:51:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:49,703 INFO L93 Difference]: Finished difference Result 275 states and 351 transitions. [2021-11-21 01:51:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:51:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2021-11-21 01:51:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:49,705 INFO L225 Difference]: With dead ends: 275 [2021-11-21 01:51:49,705 INFO L226 Difference]: Without dead ends: 275 [2021-11-21 01:51:49,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:51:49,706 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 288 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:49,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 198 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:51:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-21 01:51:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 228. [2021-11-21 01:51:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 175 states have (on average 1.5885714285714285) internal successors, (278), 218 states have internal predecessors, (278), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:51:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 290 transitions. [2021-11-21 01:51:49,714 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 290 transitions. Word has length 34 [2021-11-21 01:51:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:49,714 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 290 transitions. [2021-11-21 01:51:49,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:51:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 290 transitions. [2021-11-21 01:51:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:51:49,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:49,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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 01:51:49,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-21 01:51:49,715 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:49,716 INFO L85 PathProgramCache]: Analyzing trace with hash -216727084, now seen corresponding path program 1 times [2021-11-21 01:51:49,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:49,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459225679] [2021-11-21 01:51:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:49,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:51:50,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459225679] [2021-11-21 01:51:50,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459225679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:51:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548599669] [2021-11-21 01:51:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:50,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:50,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:50,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:50,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:51:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:51,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-21 01:51:51,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:51,190 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:51:51,190 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 01:51:51,447 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 46 treesize of output 42 [2021-11-21 01:51:51,453 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 42 treesize of output 38 [2021-11-21 01:51:51,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,671 INFO L354 Elim1Store]: treesize reduction 56, result has 41.1 percent of original size [2021-11-21 01:51:51,672 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 2 case distinctions, treesize of input 84 treesize of output 102 [2021-11-21 01:51:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,731 INFO L354 Elim1Store]: treesize reduction 56, result has 41.1 percent of original size [2021-11-21 01:51:51,731 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 2 case distinctions, treesize of input 102 treesize of output 120 [2021-11-21 01:51:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,951 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 42 treesize of output 29 [2021-11-21 01:51:51,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:51,964 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 42 treesize of output 29 [2021-11-21 01:51:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:52,064 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 67 treesize of output 69 [2021-11-21 01:51:52,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:52,073 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 63 treesize of output 65 [2021-11-21 01:51:52,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:52,177 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 01:51:52,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 94 treesize of output 51 [2021-11-21 01:51:52,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:52,184 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 01:51:52,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 42 treesize of output 20 [2021-11-21 01:51:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:52,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:51:52,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548599669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:52,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:51:52,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 26 [2021-11-21 01:51:52,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093197208] [2021-11-21 01:51:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:52,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:51:52,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:52,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:51:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:51:52,245 INFO L87 Difference]: Start difference. First operand 228 states and 290 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:51:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:53,030 INFO L93 Difference]: Finished difference Result 239 states and 301 transitions. [2021-11-21 01:51:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:51:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-21 01:51:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:53,032 INFO L225 Difference]: With dead ends: 239 [2021-11-21 01:51:53,032 INFO L226 Difference]: Without dead ends: 239 [2021-11-21 01:51:53,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:51:53,033 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 35 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:53,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 805 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 370 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2021-11-21 01:51:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-21 01:51:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-21 01:51:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 186 states have (on average 1.553763440860215) internal successors, (289), 229 states have internal predecessors, (289), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:51:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 301 transitions. [2021-11-21 01:51:53,041 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 301 transitions. Word has length 35 [2021-11-21 01:51:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:53,041 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 301 transitions. [2021-11-21 01:51:53,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:51:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 301 transitions. [2021-11-21 01:51:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:51:53,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:53,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 01:51:53,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:51:53,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:53,265 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:51:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:53,265 INFO L85 PathProgramCache]: Analyzing trace with hash 154082173, now seen corresponding path program 1 times [2021-11-21 01:51:53,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:53,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438628766] [2021-11-21 01:51:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:53,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:51:54,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:54,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438628766] [2021-11-21 01:51:54,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438628766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:51:54,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735878186] [2021-11-21 01:51:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:54,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:54,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:54,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:54,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:51:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:54,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-21 01:51:54,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:54,464 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:51:54,464 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 01:51:54,740 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 49 treesize of output 48 [2021-11-21 01:51:54,744 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 34 treesize of output 33 [2021-11-21 01:51:54,848 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 49 treesize of output 48 [2021-11-21 01:51:54,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-21 01:51:54,894 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 29 treesize of output 13 [2021-11-21 01:51:54,905 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 29 treesize of output 13 [2021-11-21 01:51:55,033 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 01:51:55,033 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 41 treesize of output 46 [2021-11-21 01:51:55,048 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:51:55,049 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 43 treesize of output 42 [2021-11-21 01:51:55,324 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-21 01:51:55,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 91 [2021-11-21 01:51:55,351 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-21 01:51:55,351 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 93 treesize of output 91 [2021-11-21 01:51:57,166 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 01:51:57,167 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 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 01:51:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:51:57,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:51:58,007 INFO L354 Elim1Store]: treesize reduction 45, result has 28.6 percent of original size [2021-11-21 01:51:58,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 194 treesize of output 169 [2021-11-21 01:51:59,240 INFO L354 Elim1Store]: treesize reduction 58, result has 23.7 percent of original size [2021-11-21 01:51:59,241 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 113 treesize of output 93 [2021-11-21 01:51:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:59,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735878186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:51:59,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536779665] [2021-11-21 01:51:59,666 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:51:59,666 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:51:59,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:51:59,666 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:51:59,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:52:00,314 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-21 01:52:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-21 01:52:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:03,251 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:52:03,251 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 1 case distinctions, treesize of input 267 treesize of output 242 [2021-11-21 01:52:03,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:03,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:03,303 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:52:03,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 239 [2021-11-21 01:52:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:03,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:03,362 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:52:03,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-21 01:52:04,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:04,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,396 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:52:04,397 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 282 treesize of output 280 [2021-11-21 01:52:04,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,433 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:52:04,434 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 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-21 01:52:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,485 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:52:04,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-21 01:52:04,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,887 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 302 treesize of output 296 [2021-11-21 01:52:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,918 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:52:04,919 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 4 case distinctions, treesize of input 298 treesize of output 281 [2021-11-21 01:52:04,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:04,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:04,975 INFO L354 Elim1Store]: treesize reduction 137, result has 4.9 percent of original size [2021-11-21 01:52:04,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 279 treesize of output 265 [2021-11-21 01:52:05,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:05,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:05,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:05,908 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:52:05,909 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 7 case distinctions, treesize of input 297 treesize of output 295 [2021-11-21 01:52:05,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:05,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:05,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:05,981 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-21 01:52:05,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 293 treesize of output 300 [2021-11-21 01:52:06,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:06,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:06,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:06,036 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:52:06,037 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 3 case distinctions, treesize of input 288 treesize of output 274 [2021-11-21 01:52:07,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:07,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,653 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-21 01:52:07,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 285 treesize of output 296 [2021-11-21 01:52:07,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:52:07,691 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 2 case distinctions, treesize of input 290 treesize of output 268 [2021-11-21 01:52:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:07,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:07,773 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:52:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 267 treesize of output 266 [2021-11-21 01:52:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:10,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-21 01:52:10,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:10,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:52:11,827 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-21 01:52:11,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 599 treesize of output 602 [2021-11-21 01:52:21,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:21,957 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-21 01:52:21,958 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 282 treesize of output 276 [2021-11-21 01:52:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,001 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:52:22,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 280 treesize of output 275 [2021-11-21 01:52:22,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,028 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:52:22,028 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 1 case distinctions, treesize of input 276 treesize of output 251 [2021-11-21 01:52:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,478 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:52:22,478 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 4 case distinctions, treesize of input 304 treesize of output 281 [2021-11-21 01:52:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,517 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:52:22,518 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 4 case distinctions, treesize of input 285 treesize of output 268 [2021-11-21 01:52:22,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:22,553 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 266 treesize of output 260 [2021-11-21 01:52:23,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,377 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:52:23,378 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 3 case distinctions, treesize of input 299 treesize of output 285 [2021-11-21 01:52:23,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,447 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:52:23,447 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 7 case distinctions, treesize of input 284 treesize of output 282 [2021-11-21 01:52:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:23,516 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-21 01:52:23,516 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 7 case distinctions, treesize of input 280 treesize of output 282 [2021-11-21 01:52:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,396 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-21 01:52:25,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 295 [2021-11-21 01:52:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:52:25,427 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 2 case distinctions, treesize of input 287 treesize of output 265 [2021-11-21 01:52:25,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:25,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:25,494 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:52:25,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 264 treesize of output 263 [2021-11-21 01:52:28,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:28,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:28,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:52:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:29,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:29,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-21 01:52:29,641 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 01:52:29,817 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:52:31,575 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-21 01:52:31,603 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:52:37,947 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:52:37,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:52:37,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-11-21 01:52:37,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869442591] [2021-11-21 01:52:37,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:52:37,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:52:37,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:52:37,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2331, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 01:52:37,951 INFO L87 Difference]: Start difference. First operand 239 states and 301 transitions. Second operand has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:52:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:39,324 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions. [2021-11-21 01:52:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:52:39,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-21 01:52:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:39,327 INFO L225 Difference]: With dead ends: 262 [2021-11-21 01:52:39,327 INFO L226 Difference]: Without dead ends: 262 [2021-11-21 01:52:39,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=422, Invalid=3484, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:52:39,329 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 78 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:39,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1345 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 860 Invalid, 0 Unknown, 403 Unchecked, 0.6s Time] [2021-11-21 01:52:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-21 01:52:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 257. [2021-11-21 01:52:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 202 states have (on average 1.5396039603960396) internal successors, (311), 245 states have internal predecessors, (311), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:52:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 325 transitions. [2021-11-21 01:52:39,337 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 325 transitions. Word has length 36 [2021-11-21 01:52:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:39,337 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 325 transitions. [2021-11-21 01:52:39,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:52:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 325 transitions. [2021-11-21 01:52:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:52:39,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:39,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 01:52:39,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:39,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:39,552 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:52:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash 154082174, now seen corresponding path program 1 times [2021-11-21 01:52:39,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:39,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201751347] [2021-11-21 01:52:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:52:41,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201751347] [2021-11-21 01:52:41,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201751347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756149985] [2021-11-21 01:52:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:41,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:41,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:41,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:41,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:52:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-21 01:52:41,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:41,473 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:52:41,474 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 01:52:41,486 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 01:52:41,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-21 01:52:41,779 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 34 treesize of output 33 [2021-11-21 01:52:41,861 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 49 treesize of output 48 [2021-11-21 01:52:41,867 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 34 treesize of output 33 [2021-11-21 01:52:41,914 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 29 treesize of output 13 [2021-11-21 01:52:41,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-21 01:52:42,097 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 01:52:42,097 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 41 treesize of output 46 [2021-11-21 01:52:42,110 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:52:42,110 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 43 treesize of output 42 [2021-11-21 01:52:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:42,377 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 01:52:42,377 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 92 treesize of output 82 [2021-11-21 01:52:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:42,391 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 01:52:42,391 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 88 treesize of output 90 [2021-11-21 01:52:43,210 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-21 01:52:43,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 187 [2021-11-21 01:52:43,224 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:52:43,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 178 treesize of output 180 [2021-11-21 01:52:45,192 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-21 01:52:45,192 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 179 treesize of output 160 [2021-11-21 01:52:45,212 INFO L354 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2021-11-21 01:52:45,212 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 151 treesize of output 138 [2021-11-21 01:52:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:45,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:46,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756149985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:46,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683846893] [2021-11-21 01:52:46,424 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:52:46,424 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:52:46,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:52:46,424 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:52:46,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:52:47,294 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-21 01:52:47,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-21 01:52:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:49,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:49,978 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:52:49,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-21 01:52:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:49,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:50,026 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:52:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-21 01:52:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:50,053 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:52:50,054 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 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-21 01:52:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,138 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:52:51,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-21 01:52:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,226 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:52:51,226 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 278 treesize of output 276 [2021-11-21 01:52:51,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,258 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:52:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-21 01:52:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,660 INFO L354 Elim1Store]: treesize reduction 141, result has 2.1 percent of original size [2021-11-21 01:52:51,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 302 treesize of output 284 [2021-11-21 01:52:51,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,703 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:52:51,703 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 4 case distinctions, treesize of input 283 treesize of output 266 [2021-11-21 01:52:51,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:51,721 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 264 treesize of output 258 [2021-11-21 01:52:52,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:52,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:52,953 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-21 01:52:52,954 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 7 case distinctions, treesize of input 290 treesize of output 298 [2021-11-21 01:52:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:52,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:52,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:53,017 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:52:53,018 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 7 case distinctions, treesize of input 292 treesize of output 290 [2021-11-21 01:52:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:53,050 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:52:53,050 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 3 case distinctions, treesize of input 288 treesize of output 274 [2021-11-21 01:52:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:52:55,255 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 2 case distinctions, treesize of input 272 treesize of output 250 [2021-11-21 01:52:55,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:55,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,341 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-21 01:52:55,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 249 treesize of output 257 [2021-11-21 01:52:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:55,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:52:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:55,417 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-21 01:52:55,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 249 treesize of output 252 [2021-11-21 01:52:58,214 INFO L354 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2021-11-21 01:52:58,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 216 treesize of output 214 [2021-11-21 01:52:58,849 INFO L354 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2021-11-21 01:52:58,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 266 treesize of output 264 [2021-11-21 01:52:59,725 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-11-21 01:52:59,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 616 treesize of output 618 [2021-11-21 01:53:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,050 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:53:22,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-21 01:53:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,107 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-21 01:53:22,107 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 278 treesize of output 272 [2021-11-21 01:53:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,132 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:53:22,132 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 1 case distinctions, treesize of input 276 treesize of output 251 [2021-11-21 01:53:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,600 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:53:22,600 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 4 case distinctions, treesize of input 304 treesize of output 281 [2021-11-21 01:53:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,627 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:53:22,627 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 4 case distinctions, treesize of input 285 treesize of output 268 [2021-11-21 01:53:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:22,652 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 266 treesize of output 260 [2021-11-21 01:53:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,665 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:53:23,666 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 7 case distinctions, treesize of input 299 treesize of output 297 [2021-11-21 01:53:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,749 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-21 01:53:23,750 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 7 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 01:53:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:23,777 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:53:23,777 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 3 case distinctions, treesize of input 288 treesize of output 274 [2021-11-21 01:53:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:25,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,606 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-21 01:53:25,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 295 [2021-11-21 01:53:25,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:53:25,628 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 2 case distinctions, treesize of input 283 treesize of output 261 [2021-11-21 01:53:25,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:25,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:25,694 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:53:25,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 260 treesize of output 259 [2021-11-21 01:53:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:28,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:28,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:53:29,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:29,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:29,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-21 01:53:29,985 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:53:30,063 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 01:53:31,771 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-21 01:53:31,800 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:53:38,287 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:53:38,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:53:38,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 27 [2021-11-21 01:53:38,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729184891] [2021-11-21 01:53:38,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:53:38,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:53:38,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:53:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2935, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 01:53:38,290 INFO L87 Difference]: Start difference. First operand 257 states and 325 transitions. Second operand has 28 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:53:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:40,976 INFO L93 Difference]: Finished difference Result 259 states and 327 transitions. [2021-11-21 01:53:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:53:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-21 01:53:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:40,978 INFO L225 Difference]: With dead ends: 259 [2021-11-21 01:53:40,978 INFO L226 Difference]: Without dead ends: 259 [2021-11-21 01:53:40,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=487, Invalid=4343, Unknown=0, NotChecked=0, Total=4830 [2021-11-21 01:53:40,980 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 85 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:40,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1326 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 876 Invalid, 0 Unknown, 518 Unchecked, 0.6s Time] [2021-11-21 01:53:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-21 01:53:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-11-21 01:53:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 202 states have (on average 1.5346534653465347) internal successors, (310), 245 states have internal predecessors, (310), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:53:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 324 transitions. [2021-11-21 01:53:40,987 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 324 transitions. Word has length 36 [2021-11-21 01:53:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:40,987 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 324 transitions. [2021-11-21 01:53:40,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:53:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 324 transitions. [2021-11-21 01:53:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:53:40,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:40,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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 01:53:41,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:53:41,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-21 01:53:41,202 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:53:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1285328636, now seen corresponding path program 1 times [2021-11-21 01:53:41,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:41,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101037866] [2021-11-21 01:53:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:41,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:53:41,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101037866] [2021-11-21 01:53:41,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101037866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:53:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181875146] [2021-11-21 01:53:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:41,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:53:41,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:53:41,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:53:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-21 01:53:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:53:41,979 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 01:53:42,234 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 11 [2021-11-21 01:53:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:42,320 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 37 treesize of output 28 [2021-11-21 01:53:42,529 INFO L354 Elim1Store]: treesize reduction 51, result has 38.6 percent of original size [2021-11-21 01:53:42,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 89 [2021-11-21 01:53:42,803 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-21 01:53:42,804 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 122 treesize of output 58 [2021-11-21 01:53:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:53:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:53:43,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181875146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:53:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157862274] [2021-11-21 01:53:43,098 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 01:53:43,098 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:53:43,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:53:43,099 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:53:43,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:53:43,801 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-21 01:53:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-21 01:53:46,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:46,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:46,349 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:53:46,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-21 01:53:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:46,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:46,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:46,390 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:53:46,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-21 01:53:46,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:46,413 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:53:46,413 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 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-21 01:53:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,316 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:53:47,316 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 282 treesize of output 280 [2021-11-21 01:53:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,344 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:53:47,344 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 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-21 01:53:47,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,389 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:53:47,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-21 01:53:47,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,893 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 302 treesize of output 296 [2021-11-21 01:53:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,942 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:53:47,942 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 4 case distinctions, treesize of input 298 treesize of output 281 [2021-11-21 01:53:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:47,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,002 INFO L354 Elim1Store]: treesize reduction 137, result has 4.9 percent of original size [2021-11-21 01:53:48,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 279 treesize of output 265 [2021-11-21 01:53:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:48,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,949 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-21 01:53:48,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 297 treesize of output 304 [2021-11-21 01:53:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:49,013 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:53:49,014 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 7 case distinctions, treesize of input 292 treesize of output 290 [2021-11-21 01:53:49,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:49,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:49,044 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:53:49,045 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 3 case distinctions, treesize of input 288 treesize of output 274 [2021-11-21 01:53:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:50,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,733 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:53:50,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 286 [2021-11-21 01:53:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:53:50,756 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 2 case distinctions, treesize of input 277 treesize of output 255 [2021-11-21 01:53:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:50,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:50,827 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-21 01:53:50,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 254 treesize of output 262 [2021-11-21 01:53:52,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:52,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:52,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-21 01:53:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,524 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 47 treesize of output 33 [2021-11-21 01:53:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:52,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:53:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:52,648 INFO L354 Elim1Store]: treesize reduction 36, result has 30.8 percent of original size [2021-11-21 01:53:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 71 [2021-11-21 01:53:54,027 INFO L354 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2021-11-21 01:53:54,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 191 treesize of output 189 [2021-11-21 01:53:54,550 INFO L354 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2021-11-21 01:53:54,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 191 treesize of output 189 [2021-11-21 01:53:55,336 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-11-21 01:53:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 628 treesize of output 630 [2021-11-21 01:54:20,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,073 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:54:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-21 01:54:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,131 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:54:20,131 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 278 treesize of output 276 [2021-11-21 01:54:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,156 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:54:20,156 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 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-21 01:54:20,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,598 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:54:20,599 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 4 case distinctions, treesize of input 302 treesize of output 285 [2021-11-21 01:54:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:20,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,672 INFO L354 Elim1Store]: treesize reduction 137, result has 4.9 percent of original size [2021-11-21 01:54:20,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 283 treesize of output 269 [2021-11-21 01:54:20,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 258 [2021-11-21 01:54:21,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,724 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-21 01:54:21,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 297 treesize of output 304 [2021-11-21 01:54:21,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,784 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:54:21,784 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 7 case distinctions, treesize of input 292 treesize of output 290 [2021-11-21 01:54:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:21,815 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:54:21,815 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 3 case distinctions, treesize of input 288 treesize of output 274 [2021-11-21 01:54:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:23,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:23,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,566 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:54:23,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 285 treesize of output 284 [2021-11-21 01:54:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:54:23,589 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 2 case distinctions, treesize of input 275 treesize of output 253 [2021-11-21 01:54:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:23,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:23,658 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-21 01:54:23,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 252 treesize of output 260 [2021-11-21 01:54:25,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:25,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:25,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,231 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-21 01:54:25,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 67 [2021-11-21 01:54:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-21 01:54:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:25,544 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 47 treesize of output 33 [2021-11-21 01:54:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:54:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:28,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:54:28,818 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:54:28,829 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 01:54:30,614 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-21 01:54:30,642 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:54:36,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:54:36,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:54:36,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2021-11-21 01:54:36,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990743328] [2021-11-21 01:54:36,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:54:36,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:54:36,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:54:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:54:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2205, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 01:54:36,597 INFO L87 Difference]: Start difference. First operand 257 states and 324 transitions. Second operand has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:54:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:39,615 INFO L93 Difference]: Finished difference Result 829 states and 947 transitions. [2021-11-21 01:54:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:54:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2021-11-21 01:54:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:39,620 INFO L225 Difference]: With dead ends: 829 [2021-11-21 01:54:39,620 INFO L226 Difference]: Without dead ends: 829 [2021-11-21 01:54:39,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=964, Invalid=6008, Unknown=0, NotChecked=0, Total=6972 [2021-11-21 01:54:39,623 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 2556 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:39,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2558 Valid, 1543 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2283 Invalid, 0 Unknown, 466 Unchecked, 1.4s Time] [2021-11-21 01:54:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-21 01:54:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 309. [2021-11-21 01:54:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 248 states have (on average 1.5241935483870968) internal successors, (378), 291 states have internal predecessors, (378), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-21 01:54:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 400 transitions. [2021-11-21 01:54:39,635 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 400 transitions. Word has length 37 [2021-11-21 01:54:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:54:39,635 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 400 transitions. [2021-11-21 01:54:39,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:54:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 400 transitions. [2021-11-21 01:54:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:54:39,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:39,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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 01:54:39,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:54:39,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-21 01:54:39,850 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:54:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1285328637, now seen corresponding path program 1 times [2021-11-21 01:54:39,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:39,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018012251] [2021-11-21 01:54:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:39,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:54:40,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018012251] [2021-11-21 01:54:40,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018012251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:54:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387253175] [2021-11-21 01:54:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:40,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:54:40,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:54:40,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:54:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-21 01:54:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:54:40,638 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 01:54:40,643 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 01:54:40,986 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 11 [2021-11-21 01:54:41,002 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 11 [2021-11-21 01:54:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2021-11-21 01:54:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:41,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2021-11-21 01:54:41,519 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-21 01:54:41,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 34 treesize of output 36 [2021-11-21 01:54:41,527 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-21 01:54:41,527 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 33 treesize of output 33 [2021-11-21 01:54:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:41,833 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-21 01:54:41,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 139 treesize of output 114 [2021-11-21 01:54:41,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:41,846 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-21 01:54:41,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 105 treesize of output 80 [2021-11-21 01:54:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:54:41,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:54:42,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387253175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:54:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179796997] [2021-11-21 01:54:42,529 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 01:54:42,529 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:54:42,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:54:42,530 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:54:42,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:54:43,319 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-21 01:54:43,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-21 01:54:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:45,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:45,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:45,869 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:54:45,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-21 01:54:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:45,921 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:54:45,922 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 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-21 01:54:45,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:45,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:45,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:45,957 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:54:45,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-21 01:54:46,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:46,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:46,856 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:54:46,857 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 282 treesize of output 280 [2021-11-21 01:54:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:46,883 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:54:46,884 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 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-21 01:54:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:46,946 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:54:46,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-21 01:54:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,450 INFO L354 Elim1Store]: treesize reduction 137, result has 4.9 percent of original size [2021-11-21 01:54:47,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 302 treesize of output 288 [2021-11-21 01:54:47,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,464 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 283 treesize of output 277 [2021-11-21 01:54:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:47,492 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:54:47,492 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 4 case distinctions, treesize of input 279 treesize of output 262 [2021-11-21 01:54:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,595 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-21 01:54:48,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 297 treesize of output 304 [2021-11-21 01:54:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,650 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:54:48,650 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 3 case distinctions, treesize of input 292 treesize of output 278 [2021-11-21 01:54:48,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:48,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:48,727 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:54:48,727 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 7 case distinctions, treesize of input 277 treesize of output 275 [2021-11-21 01:54:50,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:50,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,371 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:54:50,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 286 [2021-11-21 01:54:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:54:50,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 271 treesize of output 249 [2021-11-21 01:54:50,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:50,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:50,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:50,463 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-21 01:54:50,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 248 treesize of output 259 [2021-11-21 01:54:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:52,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:52,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-21 01:54:52,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,245 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 47 treesize of output 33 [2021-11-21 01:54:52,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:54:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:52,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 53 [2021-11-21 01:54:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:54:54,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:54,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:54,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:54:54,984 INFO L354 Elim1Store]: treesize reduction 126, result has 17.1 percent of original size [2021-11-21 01:54:54,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 616 treesize of output 620 [2021-11-21 01:55:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:09,918 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:55:09,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-21 01:55:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:09,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:09,995 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:55:09,995 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 8 case distinctions, treesize of input 278 treesize of output 276 [2021-11-21 01:55:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,021 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:55:10,022 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 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-21 01:55:10,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 296 [2021-11-21 01:55:10,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:10,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,417 INFO L354 Elim1Store]: treesize reduction 141, result has 2.1 percent of original size [2021-11-21 01:55:10,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 298 treesize of output 280 [2021-11-21 01:55:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:10,446 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:55:10,446 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 4 case distinctions, treesize of input 279 treesize of output 262 [2021-11-21 01:55:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,427 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-21 01:55:11,428 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 7 case distinctions, treesize of input 290 treesize of output 298 [2021-11-21 01:55:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:11,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,488 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:55:11,489 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 7 case distinctions, treesize of input 292 treesize of output 290 [2021-11-21 01:55:11,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:11,520 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:55:11,520 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 3 case distinctions, treesize of input 288 treesize of output 274 [2021-11-21 01:55:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:13,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,379 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-21 01:55:13,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 272 treesize of output 280 [2021-11-21 01:55:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:55:13,403 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 2 case distinctions, treesize of input 268 treesize of output 246 [2021-11-21 01:55:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:13,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:13,472 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:55:13,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 245 treesize of output 244 [2021-11-21 01:55:15,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:15,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-21 01:55:15,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:15,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,262 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-21 01:55:15,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 67 [2021-11-21 01:55:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:15,461 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 47 treesize of output 33 [2021-11-21 01:55:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:17,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:17,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:55:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:17,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:17,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:55:18,724 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:55:18,772 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 01:55:20,508 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-21 01:55:20,536 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:55:27,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:55:27,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:55:27,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-11-21 01:55:27,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367143683] [2021-11-21 01:55:27,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:55:27,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:55:27,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:55:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2348, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 01:55:27,389 INFO L87 Difference]: Start difference. First operand 309 states and 400 transitions. Second operand has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:55:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:29,227 INFO L93 Difference]: Finished difference Result 536 states and 666 transitions. [2021-11-21 01:55:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:55:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2021-11-21 01:55:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:29,230 INFO L225 Difference]: With dead ends: 536 [2021-11-21 01:55:29,230 INFO L226 Difference]: Without dead ends: 536 [2021-11-21 01:55:29,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=617, Invalid=3415, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 01:55:29,232 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1240 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:29,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 1112 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1546 Invalid, 0 Unknown, 174 Unchecked, 1.0s Time] [2021-11-21 01:55:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-21 01:55:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 304. [2021-11-21 01:55:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 243 states have (on average 1.522633744855967) internal successors, (370), 287 states have internal predecessors, (370), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-21 01:55:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 392 transitions. [2021-11-21 01:55:29,241 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 392 transitions. Word has length 37 [2021-11-21 01:55:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:29,241 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 392 transitions. [2021-11-21 01:55:29,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:55:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 392 transitions. [2021-11-21 01:55:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:55:29,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:29,242 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:29,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:55:29,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:29,451 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:55:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1584643731, now seen corresponding path program 1 times [2021-11-21 01:55:29,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:29,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395891469] [2021-11-21 01:55:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:29,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:55:30,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395891469] [2021-11-21 01:55:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395891469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:55:30,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236134264] [2021-11-21 01:55:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:30,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:30,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:55:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 01:55:30,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:30,855 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:55:30,855 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 01:55:30,869 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 01:55:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,182 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 49 treesize of output 48 [2021-11-21 01:55:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,187 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 34 treesize of output 33 [2021-11-21 01:55:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,280 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 49 treesize of output 48 [2021-11-21 01:55:31,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,285 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 34 treesize of output 33 [2021-11-21 01:55:31,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,336 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 29 treesize of output 13 [2021-11-21 01:55:31,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,346 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 29 treesize of output 13 [2021-11-21 01:55:31,470 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-21 01:55:31,470 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 53 treesize of output 63 [2021-11-21 01:55:31,480 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:55:31,481 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 60 treesize of output 59 [2021-11-21 01:55:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,741 INFO L354 Elim1Store]: treesize reduction 59, result has 18.1 percent of original size [2021-11-21 01:55:31,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 95 [2021-11-21 01:55:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:31,760 INFO L354 Elim1Store]: treesize reduction 47, result has 34.7 percent of original size [2021-11-21 01:55:31,760 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 109 treesize of output 123 [2021-11-21 01:55:31,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:31,955 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-21 01:55:31,955 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 92 [2021-11-21 01:55:32,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:32,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:32,330 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-21 01:55:32,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 43 [2021-11-21 01:55:32,336 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:55:32,336 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 34 treesize of output 32 [2021-11-21 01:55:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:55:32,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:00,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236134264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:56:00,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323744043] [2021-11-21 01:56:00,051 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-21 01:56:00,052 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:56:00,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:56:00,052 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:56:00,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:56:01,296 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-21 01:56:01,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-21 01:56:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:04,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:04,344 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:56:04,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-21 01:56:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:04,382 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:56:04,383 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 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-21 01:56:04,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:04,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:04,432 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:56:04,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-21 01:56:05,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:05,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,236 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:56:05,236 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 282 treesize of output 280 [2021-11-21 01:56:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,266 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:56:05,267 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 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-21 01:56:05,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,318 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:56:05,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-21 01:56:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,023 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:56:06,024 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 4 case distinctions, treesize of input 302 treesize of output 285 [2021-11-21 01:56:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,080 INFO L354 Elim1Store]: treesize reduction 137, result has 4.9 percent of original size [2021-11-21 01:56:06,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 283 treesize of output 269 [2021-11-21 01:56:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,096 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 264 treesize of output 258 [2021-11-21 01:56:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,993 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:56:06,993 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 3 case distinctions, treesize of input 297 treesize of output 283 [2021-11-21 01:56:07,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:07,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:07,061 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:56:07,062 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 7 case distinctions, treesize of input 282 treesize of output 280 [2021-11-21 01:56:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:07,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:07,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:07,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:07,138 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-21 01:56:07,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 278 treesize of output 285 [2021-11-21 01:56:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:09,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:09,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,223 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-21 01:56:09,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 290 [2021-11-21 01:56:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:09,255 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 2 case distinctions, treesize of input 279 treesize of output 257 [2021-11-21 01:56:09,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:09,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:09,356 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-21 01:56:09,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 256 treesize of output 264 [2021-11-21 01:56:17,557 INFO L354 Elim1Store]: treesize reduction 120, result has 11.8 percent of original size [2021-11-21 01:56:17,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 206 treesize of output 206 [2021-11-21 01:56:18,120 INFO L354 Elim1Store]: treesize reduction 120, result has 11.8 percent of original size [2021-11-21 01:56:18,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 206 treesize of output 206 [2021-11-21 01:56:18,982 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-11-21 01:56:18,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 600 treesize of output 602 [2021-11-21 01:56:36,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:36,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:36,666 INFO L354 Elim1Store]: treesize reduction 457, result has 0.2 percent of original size [2021-11-21 01:56:36,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 case distinctions, treesize of input 340 treesize of output 266 [2021-11-21 01:56:36,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:36,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:36,761 INFO L354 Elim1Store]: treesize reduction 492, result has 0.2 percent of original size [2021-11-21 01:56:36,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 242 treesize of output 1 [2021-11-21 01:56:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,318 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:56:37,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-21 01:56:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,347 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:56:37,347 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 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-21 01:56:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,410 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:56:37,410 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 255 treesize of output 253 [2021-11-21 01:56:37,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:37,990 INFO L354 Elim1Store]: treesize reduction 141, result has 2.1 percent of original size [2021-11-21 01:56:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 302 treesize of output 284 [2021-11-21 01:56:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,014 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 285 treesize of output 279 [2021-11-21 01:56:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:38,057 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:56:38,057 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 4 case distinctions, treesize of input 281 treesize of output 264 [2021-11-21 01:56:39,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,229 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:56:39,229 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 7 case distinctions, treesize of input 299 treesize of output 297 [2021-11-21 01:56:39,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:39,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,304 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-21 01:56:39,305 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 7 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 01:56:39,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:39,337 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:56:39,338 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 3 case distinctions, treesize of input 288 treesize of output 274 [2021-11-21 01:56:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:41,104 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 2 case distinctions, treesize of input 287 treesize of output 265 [2021-11-21 01:56:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,185 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-21 01:56:41,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 264 treesize of output 267 [2021-11-21 01:56:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:41,262 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-21 01:56:41,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 252 treesize of output 263 [2021-11-21 01:56:49,756 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 01:56:49,794 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:56:50,910 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-21 01:56:50,940 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:56:57,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:56:57,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:56:57,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2021-11-21 01:56:57,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060053915] [2021-11-21 01:56:57,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:56:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:56:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:56:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2607, Unknown=10, NotChecked=0, Total=2970 [2021-11-21 01:56:57,519 INFO L87 Difference]: Start difference. First operand 304 states and 392 transitions. Second operand has 22 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:56:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:59,097 INFO L93 Difference]: Finished difference Result 393 states and 496 transitions. [2021-11-21 01:56:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:56:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-11-21 01:56:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:59,100 INFO L225 Difference]: With dead ends: 393 [2021-11-21 01:56:59,100 INFO L226 Difference]: Without dead ends: 393 [2021-11-21 01:56:59,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=463, Invalid=3433, Unknown=10, NotChecked=0, Total=3906 [2021-11-21 01:56:59,101 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 150 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:59,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1027 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 988 Invalid, 0 Unknown, 323 Unchecked, 0.8s Time] [2021-11-21 01:56:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-21 01:56:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 324. [2021-11-21 01:56:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 261 states have (on average 1.5057471264367817) internal successors, (393), 305 states have internal predecessors, (393), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-21 01:56:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 419 transitions. [2021-11-21 01:56:59,111 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 419 transitions. Word has length 36 [2021-11-21 01:56:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:59,111 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 419 transitions. [2021-11-21 01:56:59,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:56:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 419 transitions. [2021-11-21 01:56:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:56:59,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:59,112 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:59,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:59,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-21 01:56:59,338 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:56:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1584643732, now seen corresponding path program 1 times [2021-11-21 01:56:59,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:59,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635561434] [2021-11-21 01:56:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:59,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:00,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635561434] [2021-11-21 01:57:00,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635561434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:57:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526382305] [2021-11-21 01:57:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:00,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:00,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:00,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:57:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:00,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-21 01:57:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:00,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:57:00,456 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:57:00,456 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 01:57:00,646 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 49 treesize of output 48 [2021-11-21 01:57:00,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-21 01:57:00,700 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 49 treesize of output 48 [2021-11-21 01:57:00,704 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 34 treesize of output 33 [2021-11-21 01:57:00,745 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 29 treesize of output 13 [2021-11-21 01:57:00,772 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 29 treesize of output 13 [2021-11-21 01:57:00,875 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:57:00,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-11-21 01:57:00,901 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 01:57:00,901 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 37 treesize of output 42 [2021-11-21 01:57:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:01,106 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 01:57:01,106 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 83 treesize of output 77 [2021-11-21 01:57:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:57:01,118 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 01:57:01,118 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 79 treesize of output 81 [2021-11-21 01:57:01,615 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-21 01:57:01,615 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 108 treesize of output 89 [2021-11-21 01:57:01,629 INFO L354 Elim1Store]: treesize reduction 84, result has 7.7 percent of original size [2021-11-21 01:57:01,629 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 80 treesize of output 44 [2021-11-21 01:57:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:58,205 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_item_~cursor#1.offset| Int) (|ULTIMATE.start_create_item_#t~ite16#1.offset| Int) (|ULTIMATE.start_create_item_~link_field~0#1| Int) (|ULTIMATE.start_create_item_~term_field~0#1| Int) (|ULTIMATE.start_create_item_#t~ite16#1.base| Int) (v_DerPreprocessor_4 Int) (|ULTIMATE.start_create_item_~link~0#1.base| Int) (v_DerPreprocessor_3 Int) (|ULTIMATE.start_create_item_~link~0#1.offset| Int)) (let ((.cse12 (* ~unnamed1~0~LIST_BEG 4)) (.cse16 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |ULTIMATE.start_create_item_~link_field~0#1| 4))) (.cse17 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4))) (.cse18 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| 8))) (let ((.cse13 (let ((.cse19 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse16 |ULTIMATE.start_create_item_~link~0#1.offset|) .cse17 |ULTIMATE.start_create_item_#t~ite16#1.offset|) .cse18 v_DerPreprocessor_4)))) (store .cse19 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse19 |c_ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|)))) (.cse11 (let ((.cse15 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse16 |ULTIMATE.start_create_item_~link~0#1.base|) .cse17 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse18 v_DerPreprocessor_3)))) (store .cse15 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse15 |c_ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)))) (.cse14 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse12))) (let ((.cse0 (store (select .cse11 |c_ULTIMATE.start_append_one_~list#1.base|) .cse14 |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse2 (store (select .cse13 |c_ULTIMATE.start_append_one_~list#1.base|) .cse14 |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (or (let ((.cse1 (+ (* ~unnamed2~0~ITEM_NEXT 4) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (= (select .cse0 .cse1) 0) (= (select .cse2 .cse1) 0))) (let ((.cse6 (+ (* ~unnamed1~0~LIST_END 4) |c_~#list~0.offset|)) (.cse10 (select (store .cse13 |c_ULTIMATE.start_append_one_~list#1.base| .cse2) |c_~#list~0.base|)) (.cse9 (+ |c_~#list~0.offset| .cse12))) (let ((.cse7 (* 4 ~unnamed2~0~ITEM_NEXT)) (.cse8 (select .cse10 .cse9)) (.cse5 (select (store .cse11 |c_ULTIMATE.start_append_one_~list#1.base| .cse0) |c_~#list~0.base|)) (.cse3 (select .cse10 .cse6)) (.cse4 (* 4 ~unnamed2~0~ITEM_PREV))) (and (<= (+ .cse3 .cse4 4) (select |c_#length| (select .cse5 .cse6))) (<= 0 (+ .cse7 .cse8)) (<= (+ .cse7 .cse8 4) (select |c_#length| (select .cse5 .cse9))) (<= 0 (+ .cse3 .cse4)))))))))) is different from false [2021-11-21 01:58:00,554 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 347 treesize of output 309 [2021-11-21 01:58:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526382305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:58:01,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013918031] [2021-11-21 01:58:01,949 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-21 01:58:01,950 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:58:01,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:58:01,950 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:58:01,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:58:04,204 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-21 01:58:04,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-21 01:58:07,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:07,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:07,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:07,545 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:58:07,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-21 01:58:07,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:07,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:07,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:07,607 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-21 01:58:07,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-21 01:58:07,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:07,643 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:58:07,643 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 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-21 01:58:09,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,105 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:58:09,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-21 01:58:09,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:09,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,186 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-21 01:58:09,186 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 278 treesize of output 272 [2021-11-21 01:58:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,216 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:58:09,216 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 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-21 01:58:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,581 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:58:09,581 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 4 case distinctions, treesize of input 302 treesize of output 285 [2021-11-21 01:58:09,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,616 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:58:09,616 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 4 case distinctions, treesize of input 283 treesize of output 262 [2021-11-21 01:58:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:09,632 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 256 treesize of output 250 [2021-11-21 01:58:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:11,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,111 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:58:11,112 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 7 case distinctions, treesize of input 283 treesize of output 281 [2021-11-21 01:58:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,234 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-21 01:58:11,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 279 treesize of output 291 [2021-11-21 01:58:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:11,272 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:58:11,272 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 3 case distinctions, treesize of input 282 treesize of output 268 [2021-11-21 01:58:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:58:13,205 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 2 case distinctions, treesize of input 279 treesize of output 257 [2021-11-21 01:58:13,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:13,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,325 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-21 01:58:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 256 treesize of output 259 [2021-11-21 01:58:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:13,449 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-21 01:58:13,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 248 treesize of output 259 [2021-11-21 01:58:23,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:23,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:23,439 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-21 01:58:23,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 45 [2021-11-21 01:58:24,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:24,311 INFO L354 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2021-11-21 01:58:24,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-11-21 01:58:25,421 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-21 01:58:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 577 treesize of output 580 [2021-11-21 01:58:42,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:42,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:42,524 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-21 01:58:42,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-21 01:58:42,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:42,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:42,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:42,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:42,631 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-21 01:58:42,632 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 278 treesize of output 276 [2021-11-21 01:58:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:42,664 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 01:58:42,665 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 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-21 01:58:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,423 INFO L354 Elim1Store]: treesize reduction 141, result has 2.1 percent of original size [2021-11-21 01:58:43,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 302 treesize of output 284 [2021-11-21 01:58:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 279 [2021-11-21 01:58:43,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:43,478 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:58:43,479 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 4 case distinctions, treesize of input 281 treesize of output 264 [2021-11-21 01:58:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,919 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-21 01:58:44,920 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 7 case distinctions, treesize of input 299 treesize of output 297 [2021-11-21 01:58:44,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,963 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:58:44,963 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 3 case distinctions, treesize of input 295 treesize of output 281 [2021-11-21 01:58:44,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:45,080 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-21 01:58:45,080 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 7 case distinctions, treesize of input 280 treesize of output 282 [2021-11-21 01:58:47,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:47,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:47,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,348 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-21 01:58:47,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 298 [2021-11-21 01:58:47,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:58:47,383 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 2 case distinctions, treesize of input 292 treesize of output 270 [2021-11-21 01:58:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:47,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:47,516 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-21 01:58:47,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 269 treesize of output 268 [2021-11-21 01:58:57,276 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 01:58:57,315 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:58:58,867 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-21 01:58:58,912 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:59:07,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:59:07,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:59:07,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2021-11-21 01:59:07,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026095056] [2021-11-21 01:59:07,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:07,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:59:07,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:59:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2536, Unknown=22, NotChecked=104, Total=2970 [2021-11-21 01:59:07,167 INFO L87 Difference]: Start difference. First operand 324 states and 419 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:59:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:09,480 INFO L93 Difference]: Finished difference Result 461 states and 590 transitions. [2021-11-21 01:59:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:59:09,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-11-21 01:59:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:09,483 INFO L225 Difference]: With dead ends: 461 [2021-11-21 01:59:09,483 INFO L226 Difference]: Without dead ends: 461 [2021-11-21 01:59:09,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=415, Invalid=3473, Unknown=22, NotChecked=122, Total=4032 [2021-11-21 01:59:09,485 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 236 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:09,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 1396 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1075 Invalid, 0 Unknown, 344 Unchecked, 1.2s Time] [2021-11-21 01:59:09,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-21 01:59:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 366. [2021-11-21 01:59:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 300 states have (on average 1.5333333333333334) internal successors, (460), 345 states have internal predecessors, (460), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-21 01:59:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 490 transitions. [2021-11-21 01:59:09,498 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 490 transitions. Word has length 36 [2021-11-21 01:59:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:09,499 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 490 transitions. [2021-11-21 01:59:09,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:59:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 490 transitions. [2021-11-21 01:59:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:59:09,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:09,500 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:09,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:09,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-21 01:59:09,714 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:59:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1579077102, now seen corresponding path program 1 times [2021-11-21 01:59:09,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:09,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941044479] [2021-11-21 01:59:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:09,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:10,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:10,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941044479] [2021-11-21 01:59:10,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941044479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:59:10,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786729380] [2021-11-21 01:59:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:10,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:10,326 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:10,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:59:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:10,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:59:10,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:10,484 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 01:59:10,772 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 11 [2021-11-21 01:59:10,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:10,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-21 01:59:11,119 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-21 01:59:11,119 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 68 treesize of output 39 [2021-11-21 01:59:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:11,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:59:11,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786729380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:59:11,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:59:11,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2021-11-21 01:59:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601259916] [2021-11-21 01:59:11,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:59:11,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:59:11,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:59:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:59:11,131 INFO L87 Difference]: Start difference. First operand 366 states and 490 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:59:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:12,166 INFO L93 Difference]: Finished difference Result 634 states and 815 transitions. [2021-11-21 01:59:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:59:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-11-21 01:59:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:12,169 INFO L225 Difference]: With dead ends: 634 [2021-11-21 01:59:12,169 INFO L226 Difference]: Without dead ends: 634 [2021-11-21 01:59:12,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:59:12,169 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 762 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:12,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 529 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:59:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-21 01:59:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 372. [2021-11-21 01:59:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 306 states have (on average 1.5326797385620916) internal successors, (469), 351 states have internal predecessors, (469), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-21 01:59:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 499 transitions. [2021-11-21 01:59:12,182 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 499 transitions. Word has length 37 [2021-11-21 01:59:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:12,183 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 499 transitions. [2021-11-21 01:59:12,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:59:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 499 transitions. [2021-11-21 01:59:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:59:12,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:12,184 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:12,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:12,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-21 01:59:12,406 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:59:12,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1579077101, now seen corresponding path program 1 times [2021-11-21 01:59:12,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:12,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052887803] [2021-11-21 01:59:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:12,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:13,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052887803] [2021-11-21 01:59:13,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052887803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:59:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744322873] [2021-11-21 01:59:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:13,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:13,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:13,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:13,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:59:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-21 01:59:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:13,353 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 01:59:13,692 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 11 [2021-11-21 01:59:13,714 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 15 treesize of output 11 [2021-11-21 01:59:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:13,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-21 01:59:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:13,836 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 37 treesize of output 28 [2021-11-21 01:59:14,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:14,125 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-21 01:59:14,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 57 [2021-11-21 01:59:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:14,136 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-21 01:59:14,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 33 [2021-11-21 01:59:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:14,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:59:14,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744322873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:59:14,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:59:14,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2021-11-21 01:59:14,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463011000] [2021-11-21 01:59:14,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:59:14,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:59:14,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:14,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:59:14,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:59:14,192 INFO L87 Difference]: Start difference. First operand 372 states and 499 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:59:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:15,310 INFO L93 Difference]: Finished difference Result 603 states and 785 transitions. [2021-11-21 01:59:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:59:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-11-21 01:59:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:15,320 INFO L225 Difference]: With dead ends: 603 [2021-11-21 01:59:15,320 INFO L226 Difference]: Without dead ends: 603 [2021-11-21 01:59:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:59:15,321 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 705 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:15,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 571 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:59:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-21 01:59:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 411. [2021-11-21 01:59:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 342 states have (on average 1.5584795321637428) internal successors, (533), 388 states have internal predecessors, (533), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-21 01:59:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 567 transitions. [2021-11-21 01:59:15,334 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 567 transitions. Word has length 37 [2021-11-21 01:59:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:15,335 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 567 transitions. [2021-11-21 01:59:15,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:59:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 567 transitions. [2021-11-21 01:59:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:59:15,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:15,336 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:15,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-21 01:59:15,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:15,550 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:59:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1579075259, now seen corresponding path program 1 times [2021-11-21 01:59:15,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842099844] [2021-11-21 01:59:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:15,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:16,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:16,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842099844] [2021-11-21 01:59:16,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842099844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:59:16,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:59:16,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-21 01:59:16,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326935454] [2021-11-21 01:59:16,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:59:16,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:59:16,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:59:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:59:16,006 INFO L87 Difference]: Start difference. First operand 411 states and 567 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:59:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:16,870 INFO L93 Difference]: Finished difference Result 601 states and 782 transitions. [2021-11-21 01:59:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:59:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-11-21 01:59:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:16,873 INFO L225 Difference]: With dead ends: 601 [2021-11-21 01:59:16,873 INFO L226 Difference]: Without dead ends: 601 [2021-11-21 01:59:16,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:59:16,873 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 814 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:16,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 750 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:59:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-21 01:59:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 368. [2021-11-21 01:59:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 302 states have (on average 1.533112582781457) internal successors, (463), 347 states have internal predecessors, (463), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-21 01:59:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 493 transitions. [2021-11-21 01:59:16,885 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 493 transitions. Word has length 37 [2021-11-21 01:59:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:16,885 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 493 transitions. [2021-11-21 01:59:16,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:59:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 493 transitions. [2021-11-21 01:59:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:59:16,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:16,887 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:16,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-21 01:59:16,887 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:59:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1363424138, now seen corresponding path program 1 times [2021-11-21 01:59:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:16,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707351242] [2021-11-21 01:59:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:16,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:59:16,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:16,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707351242] [2021-11-21 01:59:16,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707351242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:59:16,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:59:16,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:59:16,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262924716] [2021-11-21 01:59:16,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:59:16,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:59:16,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:59:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:59:16,957 INFO L87 Difference]: Start difference. First operand 368 states and 493 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:59:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:17,095 INFO L93 Difference]: Finished difference Result 516 states and 677 transitions. [2021-11-21 01:59:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:59:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-11-21 01:59:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:17,103 INFO L225 Difference]: With dead ends: 516 [2021-11-21 01:59:17,103 INFO L226 Difference]: Without dead ends: 516 [2021-11-21 01:59:17,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:59:17,103 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 217 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:17,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 266 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:59:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-21 01:59:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 367. [2021-11-21 01:59:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 302 states have (on average 1.5198675496688743) internal successors, (459), 346 states have internal predecessors, (459), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-21 01:59:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 489 transitions. [2021-11-21 01:59:17,115 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 489 transitions. Word has length 38 [2021-11-21 01:59:17,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:17,116 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 489 transitions. [2021-11-21 01:59:17,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:59:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 489 transitions. [2021-11-21 01:59:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:59:17,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:17,119 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:17,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-21 01:59:17,119 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-21 01:59:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1870723403, now seen corresponding path program 1 times [2021-11-21 01:59:17,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863666390] [2021-11-21 01:59:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:17,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:18,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863666390] [2021-11-21 01:59:18,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863666390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:59:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793269206] [2021-11-21 01:59:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:18,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:18,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:18,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5da5cd-6d8b-4ca6-80b7-045962f09130/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:59:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 01:59:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:19,161 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:59:19,161 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 01:59:19,346 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 24 [2021-11-21 01:59:19,416 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 24 [2021-11-21 01:59:19,439 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 29 treesize of output 13 [2021-11-21 01:59:19,542 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-21 01:59:19,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:59:19,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:19,730 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 01:59:19,731 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 50 treesize of output 44 [2021-11-21 01:59:20,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:20,574 INFO L354 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2021-11-21 01:59:20,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 86 [2021-11-21 01:59:20,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:59:20,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 83 [2021-11-21 01:59:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:21,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:21,522 INFO L354 Elim1Store]: treesize reduction 16, result has 70.9 percent of original size [2021-11-21 01:59:21,523 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 77 treesize of output 91 [2021-11-21 01:59:28,176 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:59:40,179 WARN L227 SmtUtils]: Spent 7.63s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:00:07,434 WARN L227 SmtUtils]: Spent 18.46s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:00:48,581 WARN L227 SmtUtils]: Spent 16.72s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)