./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/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_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:24:51,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:24:51,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:24:51,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:24:51,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:24:51,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:24:51,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:24:51,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:24:51,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:24:51,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:24:51,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:24:51,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:24:51,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:24:51,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:24:51,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:24:51,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:24:51,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:24:51,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:24:51,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:24:51,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:24:51,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:24:51,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:24:51,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:24:51,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:24:51,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:24:51,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:24:51,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:24:51,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:24:51,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:24:51,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:24:51,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:24:51,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:24:51,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:24:51,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:24:51,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:24:51,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:24:51,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:24:51,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:24:51,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:24:51,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:24:51,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:24:51,180 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:24:51,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:24:51,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:24:51,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:24:51,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:24:51,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:24:51,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:24:51,234 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:24:51,234 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:24:51,234 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:24:51,235 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:24:51,236 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:24:51,236 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:24:51,237 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:24:51,237 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:24:51,237 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:24:51,237 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:24:51,238 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:24:51,238 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:24:51,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:24:51,239 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:24:51,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:24:51,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:24:51,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:24:51,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:24:51,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:24:51,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:24:51,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:24:51,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:24:51,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:24:51,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:24:51,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:24:51,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:24:51,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:24:51,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:24:51,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:24:51,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:24:51,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:24:51,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:24:51,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:24:51,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:24:51,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:24:51,247 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2021-11-21 01:24:51,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:24:51,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:24:51,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:24:51,629 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:24:51,630 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:24:51,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-11-21 01:24:51,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/data/64f180e2c/2c1fd4af6194454c98af4240c6e013a5/FLAG38e84be5e [2021-11-21 01:24:52,232 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:24:52,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-11-21 01:24:52,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/data/64f180e2c/2c1fd4af6194454c98af4240c6e013a5/FLAG38e84be5e [2021-11-21 01:24:52,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/data/64f180e2c/2c1fd4af6194454c98af4240c6e013a5 [2021-11-21 01:24:52,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:24:52,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:24:52,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:24:52,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:24:52,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:24:52,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:24:52" (1/1) ... [2021-11-21 01:24:52,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c80964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:52, skipping insertion in model container [2021-11-21 01:24:52,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:24:52" (1/1) ... [2021-11-21 01:24:52,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:24:52,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:24:53,012 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-11-21 01:24:53,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:24:53,079 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:24:53,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-11-21 01:24:53,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:24:53,191 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:24:53,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53 WrapperNode [2021-11-21 01:24:53,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:24:53,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:24:53,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:24:53,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:24:53,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,257 INFO L137 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 285 [2021-11-21 01:24:53,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:24:53,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:24:53,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:24:53,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:24:53,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:24:53,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:24:53,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:24:53,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:24:53,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (1/1) ... [2021-11-21 01:24:53,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:24:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:53,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:24:53,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:24:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:24:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2021-11-21 01:24:53,448 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2021-11-21 01:24:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-11-21 01:24:53,449 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-11-21 01:24:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:24:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:24:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:24:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:24:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:24:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:24:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:24:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:24:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:24:53,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:24:53,620 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:24:53,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:24:54,047 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:24:54,117 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:24:54,117 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-11-21 01:24:54,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:24:54 BoogieIcfgContainer [2021-11-21 01:24:54,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:24:54,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:24:54,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:24:54,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:24:54,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:24:52" (1/3) ... [2021-11-21 01:24:54,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b1c76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:24:54, skipping insertion in model container [2021-11-21 01:24:54,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:24:53" (2/3) ... [2021-11-21 01:24:54,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b1c76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:24:54, skipping insertion in model container [2021-11-21 01:24:54,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:24:54" (3/3) ... [2021-11-21 01:24:54,131 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2021-11-21 01:24:54,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:24:54,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:24:54,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:24:54,199 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:24:54,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:24:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 61 states have (on average 1.901639344262295) internal successors, (116), 77 states have internal predecessors, (116), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-21 01:24:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:24:54,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:54,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:24:54,240 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash -27349111, now seen corresponding path program 1 times [2021-11-21 01:24:54,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:54,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964497743] [2021-11-21 01:24:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:54,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:54,407 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 01:24:54,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964497743] [2021-11-21 01:24:54,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964497743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:54,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:54,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:24:54,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762816604] [2021-11-21 01:24:54,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:54,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:24:54,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:24:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:24:54,451 INFO L87 Difference]: Start difference. First operand has 80 states, 61 states have (on average 1.901639344262295) internal successors, (116), 77 states have internal predecessors, (116), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:54,525 INFO L93 Difference]: Finished difference Result 156 states and 287 transitions. [2021-11-21 01:24:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:24:54,528 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:24:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:54,539 INFO L225 Difference]: With dead ends: 156 [2021-11-21 01:24:54,539 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:24:54,543 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 01:24:54,547 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:54,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:24:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:24:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-21 01:24:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 71 states have internal predecessors, (77), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2021-11-21 01:24:54,595 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 6 [2021-11-21 01:24:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:54,596 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2021-11-21 01:24:54,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2021-11-21 01:24:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:24:54,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:54,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:54,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:24:54,598 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1471689877, now seen corresponding path program 1 times [2021-11-21 01:24:54,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:54,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741132629] [2021-11-21 01:24:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:54,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:54,655 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 01:24:54,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:54,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741132629] [2021-11-21 01:24:54,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741132629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:54,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:54,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:24:54,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679059221] [2021-11-21 01:24:54,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:54,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:24:54,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:54,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:24:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:24:54,660 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:54,738 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2021-11-21 01:24:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:24:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 01:24:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:54,741 INFO L225 Difference]: With dead ends: 147 [2021-11-21 01:24:54,741 INFO L226 Difference]: Without dead ends: 76 [2021-11-21 01:24:54,742 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 01:24:54,744 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:54,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:24:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-21 01:24:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-21 01:24:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 73 states have internal predecessors, (79), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-11-21 01:24:54,759 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 7 [2021-11-21 01:24:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:54,759 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-11-21 01:24:54,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-11-21 01:24:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:24:54,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:54,761 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:54,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:24:54,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash 151165319, now seen corresponding path program 1 times [2021-11-21 01:24:54,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:54,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855629484] [2021-11-21 01:24:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:54,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:24:54,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:54,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855629484] [2021-11-21 01:24:54,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855629484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:54,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:54,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:24:54,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227027648] [2021-11-21 01:24:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:54,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:24:54,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:24:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:24:54,927 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 4 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:55,171 INFO L93 Difference]: Finished difference Result 199 states and 260 transitions. [2021-11-21 01:24:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:24:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:24:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:55,175 INFO L225 Difference]: With dead ends: 199 [2021-11-21 01:24:55,178 INFO L226 Difference]: Without dead ends: 194 [2021-11-21 01:24:55,180 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 01:24:55,182 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 230 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:55,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 186 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:24:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-21 01:24:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 79. [2021-11-21 01:24:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 76 states have internal predecessors, (83), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-11-21 01:24:55,218 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 9 [2021-11-21 01:24:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-11-21 01:24:55,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-11-21 01:24:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:24:55,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:55,229 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:55,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:24:55,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:55,232 INFO L85 PathProgramCache]: Analyzing trace with hash -195178506, now seen corresponding path program 1 times [2021-11-21 01:24:55,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:55,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877659300] [2021-11-21 01:24:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:55,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:24:55,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:55,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877659300] [2021-11-21 01:24:55,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877659300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:55,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:55,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:24:55,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36858300] [2021-11-21 01:24:55,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:55,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:55,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:55,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:55,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:24:55,391 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:55,571 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-11-21 01:24:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:24:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:24:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:55,573 INFO L225 Difference]: With dead ends: 81 [2021-11-21 01:24:55,573 INFO L226 Difference]: Without dead ends: 78 [2021-11-21 01:24:55,574 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 01:24:55,575 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 11 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:55,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 239 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:24:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-21 01:24:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-21 01:24:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 75 states have internal predecessors, (82), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-11-21 01:24:55,586 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 16 [2021-11-21 01:24:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:55,587 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-11-21 01:24:55,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-11-21 01:24:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:24:55,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:55,588 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:55,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:24:55,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:55,590 INFO L85 PathProgramCache]: Analyzing trace with hash 130237484, now seen corresponding path program 1 times [2021-11-21 01:24:55,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:55,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015049116] [2021-11-21 01:24:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:55,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:24:55,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015049116] [2021-11-21 01:24:55,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015049116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:55,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:55,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:24:55,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904787268] [2021-11-21 01:24:55,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:55,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:55,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:24:55,720 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:55,942 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2021-11-21 01:24:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:24:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:24:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:55,946 INFO L225 Difference]: With dead ends: 103 [2021-11-21 01:24:55,946 INFO L226 Difference]: Without dead ends: 100 [2021-11-21 01:24:55,947 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 01:24:55,948 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:55,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 206 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:24:55,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-21 01:24:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2021-11-21 01:24:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 74 states have internal predecessors, (81), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2021-11-21 01:24:55,969 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 16 [2021-11-21 01:24:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:55,970 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2021-11-21 01:24:55,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2021-11-21 01:24:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:24:55,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:55,973 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:55,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:24:55,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash 642186722, now seen corresponding path program 1 times [2021-11-21 01:24:55,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:55,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830419069] [2021-11-21 01:24:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:55,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:24:56,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830419069] [2021-11-21 01:24:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830419069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:56,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:56,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:24:56,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374982883] [2021-11-21 01:24:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:56,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:56,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:24:56,079 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:56,323 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2021-11-21 01:24:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:24:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 01:24:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:56,326 INFO L225 Difference]: With dead ends: 174 [2021-11-21 01:24:56,326 INFO L226 Difference]: Without dead ends: 171 [2021-11-21 01:24:56,327 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 01:24:56,328 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 179 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:56,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 190 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:24:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-21 01:24:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 83. [2021-11-21 01:24:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 80 states have internal predecessors, (87), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-21 01:24:56,340 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 19 [2021-11-21 01:24:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:56,340 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-21 01:24:56,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-21 01:24:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:24:56,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:56,342 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:56,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:24:56,342 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1429123203, now seen corresponding path program 1 times [2021-11-21 01:24:56,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:56,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667257592] [2021-11-21 01:24:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:56,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:24:56,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:56,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667257592] [2021-11-21 01:24:56,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667257592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:56,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:56,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:24:56,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066075592] [2021-11-21 01:24:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:56,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:56,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:24:56,405 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:56,636 INFO L93 Difference]: Finished difference Result 173 states and 214 transitions. [2021-11-21 01:24:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:24:56,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 01:24:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:56,638 INFO L225 Difference]: With dead ends: 173 [2021-11-21 01:24:56,638 INFO L226 Difference]: Without dead ends: 170 [2021-11-21 01:24:56,638 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 01:24:56,639 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 177 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:56,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 190 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:24:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-21 01:24:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 89. [2021-11-21 01:24:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 75 states have (on average 1.24) internal successors, (93), 86 states have internal predecessors, (93), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2021-11-21 01:24:56,649 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 19 [2021-11-21 01:24:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:56,649 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2021-11-21 01:24:56,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2021-11-21 01:24:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:24:56,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:56,651 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:56,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:24:56,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1434014563, now seen corresponding path program 1 times [2021-11-21 01:24:56,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:56,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534159220] [2021-11-21 01:24:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:56,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:24:56,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:56,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534159220] [2021-11-21 01:24:56,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534159220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:56,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:56,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:24:56,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737376398] [2021-11-21 01:24:56,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:56,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:56,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:24:56,748 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:57,008 INFO L93 Difference]: Finished difference Result 172 states and 212 transitions. [2021-11-21 01:24:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:24:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 01:24:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:57,010 INFO L225 Difference]: With dead ends: 172 [2021-11-21 01:24:57,010 INFO L226 Difference]: Without dead ends: 169 [2021-11-21 01:24:57,011 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 01:24:57,011 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 172 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:57,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 190 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:24:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-21 01:24:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 92. [2021-11-21 01:24:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 89 states have internal predecessors, (96), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2021-11-21 01:24:57,020 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 22 [2021-11-21 01:24:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:57,020 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2021-11-21 01:24:57,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2021-11-21 01:24:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:24:57,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:57,022 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:57,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:24:57,022 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1107383367, now seen corresponding path program 1 times [2021-11-21 01:24:57,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:57,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575984092] [2021-11-21 01:24:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:57,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:24:57,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575984092] [2021-11-21 01:24:57,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575984092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:57,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:24:57,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:24:57,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537743105] [2021-11-21 01:24:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:57,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:24:57,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:24:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:24:57,097 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:57,348 INFO L93 Difference]: Finished difference Result 171 states and 210 transitions. [2021-11-21 01:24:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:24:57,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 01:24:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:57,350 INFO L225 Difference]: With dead ends: 171 [2021-11-21 01:24:57,350 INFO L226 Difference]: Without dead ends: 168 [2021-11-21 01:24:57,351 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 01:24:57,351 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 170 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:57,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 190 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:24:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-21 01:24:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 95. [2021-11-21 01:24:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 92 states have internal predecessors, (99), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:24:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2021-11-21 01:24:57,359 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 22 [2021-11-21 01:24:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:57,360 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2021-11-21 01:24:57,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:24:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2021-11-21 01:24:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:24:57,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:57,362 INFO L514 BasicCegarLoop]: trace histogram [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 01:24:57,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:24:57,362 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1940354800, now seen corresponding path program 1 times [2021-11-21 01:24:57,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:57,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952560187] [2021-11-21 01:24:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:57,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:24:57,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:57,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952560187] [2021-11-21 01:24:57,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952560187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:24:57,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679150677] [2021-11-21 01:24:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:57,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:57,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:57,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:57,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:24:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:24:57,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-11-21 01:24:57,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:24:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:24:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:24:58,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679150677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:24:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112727487] [2021-11-21 01:24:58,192 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:24:58,193 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:24:58,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:24:58,204 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:24:58,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:24:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:58,440 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:24:58,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:24:58,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,523 INFO L354 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2021-11-21 01:24:58,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 75 [2021-11-21 01:24:58,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:58,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,566 INFO L354 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2021-11-21 01:24:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 63 [2021-11-21 01:24:58,713 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-21 01:24:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 20 treesize of output 41 [2021-11-21 01:24:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:58,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:58,795 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:24:58,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 37 [2021-11-21 01:24:58,920 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:24:58,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:24:59,440 INFO L354 Elim1Store]: treesize reduction 68, result has 47.7 percent of original size [2021-11-21 01:24:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 313 [2021-11-21 01:24:59,610 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-21 01:24:59,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 304 treesize of output 325 [2021-11-21 01:24:59,669 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:24:59,670 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 1 case distinctions, treesize of input 325 treesize of output 320 [2021-11-21 01:24:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,734 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:24:59,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 301 [2021-11-21 01:24:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:59,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,809 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-21 01:24:59,810 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 301 treesize of output 285 [2021-11-21 01:24:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 267 [2021-11-21 01:24:59,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,867 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:24:59,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 270 [2021-11-21 01:24:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:59,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:59,933 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-21 01:24:59,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 268 treesize of output 258 [2021-11-21 01:25:04,660 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-21 01:25:04,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 260 treesize of output 281 [2021-11-21 01:25:04,701 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:25:04,701 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 1 case distinctions, treesize of input 281 treesize of output 276 [2021-11-21 01:25:04,977 INFO L354 Elim1Store]: treesize reduction 68, result has 47.7 percent of original size [2021-11-21 01:25:04,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 274 treesize of output 326 [2021-11-21 01:25:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,028 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:25:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 301 [2021-11-21 01:25:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,106 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-21 01:25:05,107 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 301 treesize of output 285 [2021-11-21 01:25:05,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 267 [2021-11-21 01:25:05,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,175 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:25:05,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 270 [2021-11-21 01:25:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:05,238 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-21 01:25:05,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 280 treesize of output 270 [2021-11-21 01:25:05,454 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 10 for LOIs [2021-11-21 01:25:05,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:25:06,496 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:25:06,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:25:06,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-21 01:25:06,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631714523] [2021-11-21 01:25:06,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:06,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:25:06,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:06,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:25:06,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:25:06,497 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:06,652 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2021-11-21 01:25:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:25:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 01:25:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:06,653 INFO L225 Difference]: With dead ends: 97 [2021-11-21 01:25:06,654 INFO L226 Difference]: Without dead ends: 93 [2021-11-21 01:25:06,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:25:06,655 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 74 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:06,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 162 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-21 01:25:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-21 01:25:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 90 states have internal predecessors, (97), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:25:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2021-11-21 01:25:06,662 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 27 [2021-11-21 01:25:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:06,662 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2021-11-21 01:25:06,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2021-11-21 01:25:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:25:06,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:06,664 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:06,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:25:06,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:06,881 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:06,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1619153828, now seen corresponding path program 1 times [2021-11-21 01:25:06,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:06,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999142094] [2021-11-21 01:25:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:06,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:06,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999142094] [2021-11-21 01:25:06,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999142094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:06,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:06,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:25:06,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543295795] [2021-11-21 01:25:06,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:06,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:06,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:06,928 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:07,012 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2021-11-21 01:25:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:25:07,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 01:25:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:07,014 INFO L225 Difference]: With dead ends: 124 [2021-11-21 01:25:07,014 INFO L226 Difference]: Without dead ends: 121 [2021-11-21 01:25:07,014 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 01:25:07,015 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 61 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:07,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 176 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-21 01:25:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-11-21 01:25:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.2) internal successors, (102), 94 states have internal predecessors, (102), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:25:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2021-11-21 01:25:07,022 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 28 [2021-11-21 01:25:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:07,023 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2021-11-21 01:25:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2021-11-21 01:25:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 01:25:07,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:07,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:07,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:25:07,025 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash -572439464, now seen corresponding path program 1 times [2021-11-21 01:25:07,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971616583] [2021-11-21 01:25:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:07,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:07,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:07,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971616583] [2021-11-21 01:25:07,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971616583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:07,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600973219] [2021-11-21 01:25:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:07,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:07,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:07,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:07,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:25:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:07,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-21 01:25:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:07,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-21 01:25:07,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-21 01:25:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:07,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:07,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600973219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:07,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:07,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 10 [2021-11-21 01:25:07,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700424275] [2021-11-21 01:25:07,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:07,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:25:07,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:25:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:25:07,506 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:07,845 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2021-11-21 01:25:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:25:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-21 01:25:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:07,847 INFO L225 Difference]: With dead ends: 164 [2021-11-21 01:25:07,847 INFO L226 Difference]: Without dead ends: 161 [2021-11-21 01:25:07,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:25:07,848 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 217 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:07,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 324 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:25:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-21 01:25:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 106. [2021-11-21 01:25:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 103 states have internal predecessors, (112), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:25:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-11-21 01:25:07,858 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 31 [2021-11-21 01:25:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:07,859 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-11-21 01:25:07,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-11-21 01:25:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:25:07,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:07,861 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] [2021-11-21 01:25:07,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:08,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:08,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1276758561, now seen corresponding path program 1 times [2021-11-21 01:25:08,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:08,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679566401] [2021-11-21 01:25:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:08,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:08,110 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 01:25:08,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679566401] [2021-11-21 01:25:08,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679566401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:08,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:08,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:25:08,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579113770] [2021-11-21 01:25:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:08,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:08,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:08,113 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:08,233 INFO L93 Difference]: Finished difference Result 192 states and 239 transitions. [2021-11-21 01:25:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:25:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-21 01:25:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:08,236 INFO L225 Difference]: With dead ends: 192 [2021-11-21 01:25:08,236 INFO L226 Difference]: Without dead ends: 159 [2021-11-21 01:25:08,236 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 01:25:08,237 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 83 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:08,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 213 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:25:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-21 01:25:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 107. [2021-11-21 01:25:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 104 states have internal predecessors, (113), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:25:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2021-11-21 01:25:08,249 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 32 [2021-11-21 01:25:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2021-11-21 01:25:08,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2021-11-21 01:25:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:25:08,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:08,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:08,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:25:08,252 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1244734979, now seen corresponding path program 1 times [2021-11-21 01:25:08,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:08,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676673883] [2021-11-21 01:25:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:08,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:25:08,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:08,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676673883] [2021-11-21 01:25:08,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676673883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:08,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321197234] [2021-11-21 01:25:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:08,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:08,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:08,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:08,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:25:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:25:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:08,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 01:25:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:08,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 01:25:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-21 01:25:08,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-21 01:25:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:25:08,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:25:08,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321197234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010751744] [2021-11-21 01:25:08,825 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:25:08,825 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:25:08,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:25:08,826 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:25:08,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:09,007 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:25:09,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:25:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:25:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:09,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:09,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 64 [2021-11-21 01:25:09,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-11-21 01:25:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:25:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:09,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:25:09,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:10,070 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:25:10,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 471 [2021-11-21 01:25:10,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:10,590 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:25:10,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 471 treesize of output 542 [2021-11-21 01:25:10,715 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-21 01:25:10,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 542 treesize of output 532 [2021-11-21 01:25:11,045 INFO L354 Elim1Store]: treesize reduction 200, result has 30.6 percent of original size [2021-11-21 01:25:11,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 535 treesize of output 603 [2021-11-21 01:25:11,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:11,193 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-21 01:25:11,194 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 4 case distinctions, treesize of input 594 treesize of output 586 [2021-11-21 01:25:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:11,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:11,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:11,300 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:25:11,301 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 7 case distinctions, treesize of input 591 treesize of output 578 [2021-11-21 01:25:11,507 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-21 01:25:11,508 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 10 case distinctions, treesize of input 583 treesize of output 614 [2021-11-21 01:25:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:11,703 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:25:11,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 612 treesize of output 675 [2021-11-21 01:25:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:11,899 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:25:11,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 687 treesize of output 750 [2021-11-21 01:25:21,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:21,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:21,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:21,184 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:25:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:25:21,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:21,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:21,248 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:25:21,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:25:21,283 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:25:21,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:25:21,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:21,336 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:25:21,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 48 [2021-11-21 01:25:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:21,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:21,364 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:25:21,365 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 51 treesize of output 36 [2021-11-21 01:25:21,415 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:25:21,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:25:24,810 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:25:24,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:25:24,843 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:25:24,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:25:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:25:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:24,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:24,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:25:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:24,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:25:24,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:25:24,984 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 22 for LOIs [2021-11-21 01:25:25,000 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:25:25,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:25:25,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:25:25,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-11-21 01:25:25,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101722993] [2021-11-21 01:25:25,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:25,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:25:25,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:25:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:25:25,725 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:26,072 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2021-11-21 01:25:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:25:26,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-21 01:25:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:26,081 INFO L225 Difference]: With dead ends: 230 [2021-11-21 01:25:26,081 INFO L226 Difference]: Without dead ends: 152 [2021-11-21 01:25:26,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:25:26,083 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 79 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:26,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 377 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:25:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-21 01:25:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2021-11-21 01:25:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 111 states have internal predecessors, (121), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:25:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2021-11-21 01:25:26,093 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 33 [2021-11-21 01:25:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:26,093 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2021-11-21 01:25:26,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2021-11-21 01:25:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:25:26,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:26,095 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 01:25:26,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:26,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:25:26,313 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1577624387, now seen corresponding path program 1 times [2021-11-21 01:25:26,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:26,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372171584] [2021-11-21 01:25:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:26,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:26,362 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 01:25:26,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372171584] [2021-11-21 01:25:26,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372171584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:26,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:26,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:25:26,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353399768] [2021-11-21 01:25:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:26,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:25:26,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:25:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:25:26,365 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:26,622 INFO L93 Difference]: Finished difference Result 227 states and 286 transitions. [2021-11-21 01:25:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:25:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-21 01:25:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:26,624 INFO L225 Difference]: With dead ends: 227 [2021-11-21 01:25:26,624 INFO L226 Difference]: Without dead ends: 194 [2021-11-21 01:25:26,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:25:26,626 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 153 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:26,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 370 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:25:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-21 01:25:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 123. [2021-11-21 01:25:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 120 states have internal predecessors, (132), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:25:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2021-11-21 01:25:26,637 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 33 [2021-11-21 01:25:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:26,638 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2021-11-21 01:25:26,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2021-11-21 01:25:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:25:26,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:26,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:26,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:25:26,640 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1779008017, now seen corresponding path program 1 times [2021-11-21 01:25:26,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277309039] [2021-11-21 01:25:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:26,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:26,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:26,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277309039] [2021-11-21 01:25:26,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277309039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:26,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:26,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:25:26,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835209815] [2021-11-21 01:25:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:26,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:25:26,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:25:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:25:26,694 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:26,945 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-11-21 01:25:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:25:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-21 01:25:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:26,947 INFO L225 Difference]: With dead ends: 160 [2021-11-21 01:25:26,947 INFO L226 Difference]: Without dead ends: 157 [2021-11-21 01:25:26,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:25:26,948 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 109 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:26,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 230 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:25:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-21 01:25:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 133. [2021-11-21 01:25:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 130 states have internal predecessors, (144), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:25:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2021-11-21 01:25:26,959 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 34 [2021-11-21 01:25:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:26,960 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2021-11-21 01:25:26,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2021-11-21 01:25:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:25:26,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:26,961 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:26,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:25:26,962 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1033765607, now seen corresponding path program 2 times [2021-11-21 01:25:26,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:26,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111096341] [2021-11-21 01:25:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:26,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:27,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111096341] [2021-11-21 01:25:27,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111096341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025394521] [2021-11-21 01:25:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:25:27,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:27,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:27,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:27,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:25:27,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:25:27,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:25:27,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 01:25:27,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:27,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:27,198 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 30 treesize of output 30 [2021-11-21 01:25:27,211 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:25:27,211 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 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-21 01:25:27,357 INFO L354 Elim1Store]: treesize reduction 340, result has 8.4 percent of original size [2021-11-21 01:25:27,358 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 4 case distinctions, treesize of input 94 treesize of output 83 [2021-11-21 01:25:27,369 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:25:27,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 89 [2021-11-21 01:25:27,400 INFO L354 Elim1Store]: treesize reduction 52, result has 52.3 percent of original size [2021-11-21 01:25:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 115 [2021-11-21 01:25:28,080 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:25:28,080 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 121 treesize of output 105 [2021-11-21 01:25:28,427 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-11-21 01:25:28,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 37 [2021-11-21 01:25:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:28,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:28,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025394521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:28,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952239329] [2021-11-21 01:25:28,672 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:25:28,672 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:25:28,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:25:28,673 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:25:28,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:28,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:28,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:28,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:28,821 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:25:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 37 [2021-11-21 01:25:28,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:28,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:28,877 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:25:28,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:25:28,946 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-21 01:25:28,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 20 treesize of output 41 [2021-11-21 01:25:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,039 INFO L354 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2021-11-21 01:25:29,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 75 [2021-11-21 01:25:29,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,093 INFO L354 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2021-11-21 01:25:29,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 63 [2021-11-21 01:25:29,228 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:25:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:25:29,584 INFO L354 Elim1Store]: treesize reduction 68, result has 47.7 percent of original size [2021-11-21 01:25:29,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 313 [2021-11-21 01:25:29,764 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-21 01:25:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 304 treesize of output 325 [2021-11-21 01:25:29,821 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:25:29,821 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 1 case distinctions, treesize of input 325 treesize of output 320 [2021-11-21 01:25:29,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,875 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:25:29,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 301 [2021-11-21 01:25:29,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:29,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,918 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-21 01:25:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 301 treesize of output 285 [2021-11-21 01:25:29,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:29,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:29,995 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-21 01:25:29,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 280 [2021-11-21 01:25:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:30,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:30,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:30,038 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-21 01:25:30,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 280 treesize of output 270 [2021-11-21 01:25:34,835 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:25:34,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 255 [2021-11-21 01:25:35,108 INFO L354 Elim1Store]: treesize reduction 68, result has 47.7 percent of original size [2021-11-21 01:25:35,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 253 treesize of output 305 [2021-11-21 01:25:35,277 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-21 01:25:35,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 296 treesize of output 317 [2021-11-21 01:25:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,337 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:25:35,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 301 [2021-11-21 01:25:35,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,375 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-21 01:25:35,376 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 301 treesize of output 285 [2021-11-21 01:25:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 271 [2021-11-21 01:25:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,439 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:25:35,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 274 [2021-11-21 01:25:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:35,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:35,481 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-21 01:25:35,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 280 treesize of output 270 [2021-11-21 01:25:35,682 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 22 for LOIs [2021-11-21 01:25:35,698 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:25:37,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:25:37,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:25:37,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-21 01:25:37,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89739772] [2021-11-21 01:25:37,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:37,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:25:37,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:25:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:25:37,011 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:38,017 INFO L93 Difference]: Finished difference Result 218 states and 259 transitions. [2021-11-21 01:25:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:25:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-21 01:25:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:38,020 INFO L225 Difference]: With dead ends: 218 [2021-11-21 01:25:38,020 INFO L226 Difference]: Without dead ends: 215 [2021-11-21 01:25:38,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:25:38,022 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 226 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:38,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 683 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 440 Invalid, 0 Unknown, 122 Unchecked, 0.6s Time] [2021-11-21 01:25:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-21 01:25:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 144. [2021-11-21 01:25:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.2) internal successors, (156), 141 states have internal predecessors, (156), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:25:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2021-11-21 01:25:38,045 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 35 [2021-11-21 01:25:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:38,047 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2021-11-21 01:25:38,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2021-11-21 01:25:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:25:38,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:38,048 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 01:25:38,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:38,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:25:38,273 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -246829126, now seen corresponding path program 1 times [2021-11-21 01:25:38,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970035165] [2021-11-21 01:25:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:38,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:38,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970035165] [2021-11-21 01:25:38,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970035165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:38,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984908632] [2021-11-21 01:25:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:38,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:38,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:38,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:38,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:25:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 01:25:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:38,507 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 30 treesize of output 30 [2021-11-21 01:25:38,516 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:25:38,517 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 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-21 01:25:38,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:38,630 INFO L354 Elim1Store]: treesize reduction 250, result has 8.8 percent of original size [2021-11-21 01:25:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 83 [2021-11-21 01:25:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:38,636 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 89 treesize of output 89 [2021-11-21 01:25:38,661 INFO L354 Elim1Store]: treesize reduction 62, result has 43.1 percent of original size [2021-11-21 01:25:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 105 [2021-11-21 01:25:39,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:25:39,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 85 [2021-11-21 01:25:39,427 INFO L354 Elim1Store]: treesize reduction 41, result has 8.9 percent of original size [2021-11-21 01:25:39,427 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 37 [2021-11-21 01:25:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:39,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:39,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984908632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:39,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374583667] [2021-11-21 01:25:39,657 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 01:25:39,657 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:25:39,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:25:39,658 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:25:39,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,793 INFO L354 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2021-11-21 01:25:39,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 75 [2021-11-21 01:25:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,823 INFO L354 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2021-11-21 01:25:39,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 63 [2021-11-21 01:25:39,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:39,911 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:25:39,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:25:39,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:39,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:39,974 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:25:39,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 37 [2021-11-21 01:25:40,095 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:25:40,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:25:40,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:25:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:40,888 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:25:40,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 471 [2021-11-21 01:25:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:41,360 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:25:41,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 471 treesize of output 542 [2021-11-21 01:25:41,485 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-21 01:25:41,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 542 treesize of output 532 [2021-11-21 01:25:41,837 INFO L354 Elim1Store]: treesize reduction 200, result has 30.6 percent of original size [2021-11-21 01:25:41,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 535 treesize of output 603 [2021-11-21 01:25:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:41,956 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-21 01:25:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 594 treesize of output 586 [2021-11-21 01:25:41,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:41,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:41,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:42,036 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:25:42,036 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 7 case distinctions, treesize of input 591 treesize of output 578 [2021-11-21 01:25:42,185 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-21 01:25:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 583 treesize of output 614 [2021-11-21 01:25:42,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:42,384 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:25:42,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 612 treesize of output 675 [2021-11-21 01:25:42,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:42,617 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:25:42,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 687 treesize of output 750 [2021-11-21 01:25:59,126 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:25:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:25:59,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:59,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:25:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:59,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:25:59,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:25:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:59,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:25:59,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:26:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:02,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:02,571 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:26:02,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:26:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:02,661 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:26:02,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 48 [2021-11-21 01:26:02,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:02,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:02,687 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:26:02,687 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 51 treesize of output 36 [2021-11-21 01:26:02,737 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:26:02,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:26:02,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:02,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:26:02,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:26:02,831 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 33 for LOIs [2021-11-21 01:26:02,905 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:26:04,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:26:04,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:04,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-21 01:26:04,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236033979] [2021-11-21 01:26:04,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:04,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:26:04,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:04,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:26:04,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:26:04,358 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:05,112 INFO L93 Difference]: Finished difference Result 217 states and 257 transitions. [2021-11-21 01:26:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:26:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-21 01:26:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:05,113 INFO L225 Difference]: With dead ends: 217 [2021-11-21 01:26:05,114 INFO L226 Difference]: Without dead ends: 214 [2021-11-21 01:26:05,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:26:05,116 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 263 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:05,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 556 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 311 Invalid, 0 Unknown, 121 Unchecked, 0.5s Time] [2021-11-21 01:26:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-21 01:26:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 151. [2021-11-21 01:26:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 148 states have internal predecessors, (163), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:26:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2021-11-21 01:26:05,137 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 35 [2021-11-21 01:26:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:05,137 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2021-11-21 01:26:05,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2021-11-21 01:26:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:26:05,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:05,138 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 01:26:05,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:26:05,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:26:05,348 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 812578975, now seen corresponding path program 1 times [2021-11-21 01:26:05,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:05,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849568551] [2021-11-21 01:26:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:05,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:26:05,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849568551] [2021-11-21 01:26:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849568551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:05,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:05,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 01:26:05,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096802815] [2021-11-21 01:26:05,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:05,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:26:05,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:26:05,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:26:05,483 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 9 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:06,022 INFO L93 Difference]: Finished difference Result 237 states and 299 transitions. [2021-11-21 01:26:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:26:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 01:26:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:06,024 INFO L225 Difference]: With dead ends: 237 [2021-11-21 01:26:06,025 INFO L226 Difference]: Without dead ends: 234 [2021-11-21 01:26:06,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:26:06,026 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 158 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:06,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 545 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:26:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-21 01:26:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 159. [2021-11-21 01:26:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 143 states have (on average 1.2167832167832169) internal successors, (174), 156 states have internal predecessors, (174), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:26:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 194 transitions. [2021-11-21 01:26:06,042 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 194 transitions. Word has length 36 [2021-11-21 01:26:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:06,042 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 194 transitions. [2021-11-21 01:26:06,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 194 transitions. [2021-11-21 01:26:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:26:06,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:06,044 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:06,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:26:06,044 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2132997324, now seen corresponding path program 1 times [2021-11-21 01:26:06,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:06,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030633192] [2021-11-21 01:26:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:06,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:06,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:06,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030633192] [2021-11-21 01:26:06,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030633192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:06,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77340389] [2021-11-21 01:26:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:06,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:06,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:06,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:26:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:06,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-21 01:26:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:06,434 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 26 treesize of output 26 [2021-11-21 01:26:06,442 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:26:06,443 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-11-21 01:26:06,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:06,451 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 16 treesize of output 17 [2021-11-21 01:26:06,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:06,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:06,586 INFO L354 Elim1Store]: treesize reduction 331, result has 8.6 percent of original size [2021-11-21 01:26:06,586 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 5 case distinctions, treesize of input 122 treesize of output 118 [2021-11-21 01:26:06,610 INFO L354 Elim1Store]: treesize reduction 166, result has 13.1 percent of original size [2021-11-21 01:26:06,610 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 2 case distinctions, treesize of input 135 treesize of output 115 [2021-11-21 01:26:06,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:06,631 INFO L354 Elim1Store]: treesize reduction 144, result has 14.8 percent of original size [2021-11-21 01:26:06,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 118 [2021-11-21 01:26:06,648 INFO L354 Elim1Store]: treesize reduction 62, result has 43.1 percent of original size [2021-11-21 01:26:06,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 132 [2021-11-21 01:26:07,407 INFO L354 Elim1Store]: treesize reduction 159, result has 4.8 percent of original size [2021-11-21 01:26:07,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 77 [2021-11-21 01:26:07,425 INFO L354 Elim1Store]: treesize reduction 86, result has 3.4 percent of original size [2021-11-21 01:26:07,426 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 39 [2021-11-21 01:26:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:07,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:07,971 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:26:07,971 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 521 treesize of output 517 [2021-11-21 01:26:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77340389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:09,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402972385] [2021-11-21 01:26:09,305 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:26:09,305 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:09,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:26:09,306 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:26:09,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:26:09,471 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-21 01:26:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 20 treesize of output 41 [2021-11-21 01:26:09,594 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:26:09,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:26:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:26:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:26:09,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 64 [2021-11-21 01:26:09,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-11-21 01:26:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:10,818 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:26:10,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 471 [2021-11-21 01:26:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,233 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:26:11,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 471 treesize of output 542 [2021-11-21 01:26:11,318 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-21 01:26:11,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 542 treesize of output 532 [2021-11-21 01:26:11,558 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-21 01:26:11,559 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 10 case distinctions, treesize of input 534 treesize of output 565 [2021-11-21 01:26:11,931 INFO L354 Elim1Store]: treesize reduction 216, result has 25.0 percent of original size [2021-11-21 01:26:11,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 564 treesize of output 616 [2021-11-21 01:26:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,043 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-21 01:26:12,044 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 4 case distinctions, treesize of input 607 treesize of output 599 [2021-11-21 01:26:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,125 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:26:12,126 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 7 case distinctions, treesize of input 604 treesize of output 591 [2021-11-21 01:26:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,369 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:26:12,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 596 treesize of output 659 [2021-11-21 01:26:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:12,542 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:26:12,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 671 treesize of output 734 [2021-11-21 01:26:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:30,676 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:26:30,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:26:30,704 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:26:30,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:26:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:30,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:26:30,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:26:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:30,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:26:30,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:26:33,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:33,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:33,714 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:26:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:26:33,739 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:26:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:26:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:26:33,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:33,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:26:33,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:26:33,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:33,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:33,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:26:33,821 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 34 for LOIs [2021-11-21 01:26:33,861 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:26:34,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:26:34,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:34,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2021-11-21 01:26:34,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744368173] [2021-11-21 01:26:34,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:34,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:26:34,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:26:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:26:34,857 INFO L87 Difference]: Start difference. First operand 159 states and 194 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:36,917 INFO L93 Difference]: Finished difference Result 448 states and 543 transitions. [2021-11-21 01:26:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:26:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-21 01:26:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:36,920 INFO L225 Difference]: With dead ends: 448 [2021-11-21 01:26:36,920 INFO L226 Difference]: Without dead ends: 337 [2021-11-21 01:26:36,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=1937, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 01:26:36,923 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 889 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:36,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1065 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 849 Invalid, 0 Unknown, 156 Unchecked, 1.1s Time] [2021-11-21 01:26:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-21 01:26:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 183. [2021-11-21 01:26:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 167 states have (on average 1.1976047904191616) internal successors, (200), 180 states have internal predecessors, (200), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:26:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-11-21 01:26:36,963 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 38 [2021-11-21 01:26:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:36,964 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-11-21 01:26:36,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-11-21 01:26:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:26:36,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:36,966 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 01:26:36,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:37,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:37,181 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash -408400606, now seen corresponding path program 1 times [2021-11-21 01:26:37,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:37,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488222606] [2021-11-21 01:26:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:37,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:37,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488222606] [2021-11-21 01:26:37,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488222606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79687370] [2021-11-21 01:26:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:37,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:37,536 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:37,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:26:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-21 01:26:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:37,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:37,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:37,672 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-21 01:26:37,673 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 2 case distinctions, treesize of input 90 treesize of output 82 [2021-11-21 01:26:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:37,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:37,693 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-21 01:26:37,693 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 2 case distinctions, treesize of input 91 treesize of output 75 [2021-11-21 01:26:37,703 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:26:37,704 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 56 treesize of output 55 [2021-11-21 01:26:37,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:37,897 INFO L354 Elim1Store]: treesize reduction 339, result has 8.4 percent of original size [2021-11-21 01:26:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 145 treesize of output 132 [2021-11-21 01:26:37,946 INFO L354 Elim1Store]: treesize reduction 350, result has 10.7 percent of original size [2021-11-21 01:26:37,947 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 4 case distinctions, treesize of input 176 treesize of output 159 [2021-11-21 01:26:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:38,001 INFO L354 Elim1Store]: treesize reduction 240, result has 14.9 percent of original size [2021-11-21 01:26:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 162 [2021-11-21 01:26:38,030 INFO L354 Elim1Store]: treesize reduction 62, result has 43.1 percent of original size [2021-11-21 01:26:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 173 [2021-11-21 01:26:39,493 INFO L354 Elim1Store]: treesize reduction 238, result has 4.4 percent of original size [2021-11-21 01:26:39,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 205 treesize of output 110 [2021-11-21 01:26:39,538 INFO L354 Elim1Store]: treesize reduction 190, result has 3.6 percent of original size [2021-11-21 01:26:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 58 [2021-11-21 01:26:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:39,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79687370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303575652] [2021-11-21 01:26:40,250 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-21 01:26:40,251 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:40,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:26:40,252 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:26:40,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:26:40,416 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:26:40,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:26:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 64 [2021-11-21 01:26:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-11-21 01:26:40,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:26:40,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:40,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:26:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:40,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:40,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:26:40,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:41,166 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:26:41,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 471 [2021-11-21 01:26:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:41,540 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:26:41,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 471 treesize of output 542 [2021-11-21 01:26:41,645 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-21 01:26:41,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 542 treesize of output 532 [2021-11-21 01:26:41,907 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-21 01:26:41,908 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 10 case distinctions, treesize of input 534 treesize of output 565 [2021-11-21 01:26:42,268 INFO L354 Elim1Store]: treesize reduction 216, result has 25.0 percent of original size [2021-11-21 01:26:42,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 564 treesize of output 616 [2021-11-21 01:26:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:42,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:42,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:42,388 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-21 01:26:42,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 607 treesize of output 599 [2021-11-21 01:26:42,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:42,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:42,469 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:26:42,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 604 treesize of output 591 [2021-11-21 01:26:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:42,696 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:26:42,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 596 treesize of output 659 [2021-11-21 01:26:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:42,903 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:26:42,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 671 treesize of output 734 [2021-11-21 01:26:58,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:58,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:58,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:58,725 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:26:58,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:26:58,760 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:26:58,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:26:58,808 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:26:58,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:26:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:58,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:26:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:58,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:26:58,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:27:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:03,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:03,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:03,210 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:27:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:27:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:03,244 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:27:03,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 48 [2021-11-21 01:27:03,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:03,262 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:27:03,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2021-11-21 01:27:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:03,316 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:27:03,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:27:03,351 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:27:03,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:27:03,380 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:27:03,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:27:03,400 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 45 for LOIs [2021-11-21 01:27:03,719 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:27:05,419 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:27:05,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:27:05,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2021-11-21 01:27:05,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315053788] [2021-11-21 01:27:05,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:05,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:27:05,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:27:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:27:05,422 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:06,732 INFO L93 Difference]: Finished difference Result 247 states and 294 transitions. [2021-11-21 01:27:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:27:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-21 01:27:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:06,737 INFO L225 Difference]: With dead ends: 247 [2021-11-21 01:27:06,737 INFO L226 Difference]: Without dead ends: 244 [2021-11-21 01:27:06,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:27:06,739 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 259 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:06,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 604 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 363 Invalid, 0 Unknown, 107 Unchecked, 0.6s Time] [2021-11-21 01:27:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-21 01:27:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 174. [2021-11-21 01:27:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 158 states have (on average 1.2088607594936709) internal successors, (191), 171 states have internal predecessors, (191), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:27:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 211 transitions. [2021-11-21 01:27:06,771 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 211 transitions. Word has length 38 [2021-11-21 01:27:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:06,771 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 211 transitions. [2021-11-21 01:27:06,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 211 transitions. [2021-11-21 01:27:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:27:06,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:06,773 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:06,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:06,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:06,989 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash -618041108, now seen corresponding path program 1 times [2021-11-21 01:27:06,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:06,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373835739] [2021-11-21 01:27:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:06,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:27:07,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373835739] [2021-11-21 01:27:07,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373835739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:07,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:07,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:27:07,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6773835] [2021-11-21 01:27:07,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:07,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:27:07,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:07,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:27:07,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:27:07,060 INFO L87 Difference]: Start difference. First operand 174 states and 211 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:07,284 INFO L93 Difference]: Finished difference Result 252 states and 311 transitions. [2021-11-21 01:27:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:27:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-21 01:27:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:07,288 INFO L225 Difference]: With dead ends: 252 [2021-11-21 01:27:07,288 INFO L226 Difference]: Without dead ends: 202 [2021-11-21 01:27:07,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:27:07,289 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 156 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:07,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 293 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:27:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-21 01:27:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-11-21 01:27:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 147 states have (on average 1.1700680272108843) internal successors, (172), 157 states have internal predecessors, (172), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:27:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2021-11-21 01:27:07,307 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 38 [2021-11-21 01:27:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:07,307 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2021-11-21 01:27:07,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2021-11-21 01:27:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:27:07,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:07,309 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, 1] [2021-11-21 01:27:07,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 01:27:07,309 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1112511594, now seen corresponding path program 1 times [2021-11-21 01:27:07,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:07,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231782495] [2021-11-21 01:27:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:07,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:07,378 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 01:27:07,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231782495] [2021-11-21 01:27:07,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231782495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:07,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:07,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:27:07,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125696853] [2021-11-21 01:27:07,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:07,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:27:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:27:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:27:07,380 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:07,729 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2021-11-21 01:27:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:27:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-21 01:27:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:07,731 INFO L225 Difference]: With dead ends: 223 [2021-11-21 01:27:07,731 INFO L226 Difference]: Without dead ends: 220 [2021-11-21 01:27:07,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:27:07,732 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:07,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 299 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:27:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-21 01:27:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2021-11-21 01:27:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 150 states have (on average 1.1733333333333333) internal successors, (176), 160 states have internal predecessors, (176), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:27:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 191 transitions. [2021-11-21 01:27:07,751 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 191 transitions. Word has length 39 [2021-11-21 01:27:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:07,751 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 191 transitions. [2021-11-21 01:27:07,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 191 transitions. [2021-11-21 01:27:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:27:07,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:07,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:07,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 01:27:07,753 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash -721345155, now seen corresponding path program 1 times [2021-11-21 01:27:07,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:07,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653185127] [2021-11-21 01:27:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:07,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:27:07,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:07,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653185127] [2021-11-21 01:27:07,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653185127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:07,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:07,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:27:07,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959347298] [2021-11-21 01:27:07,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:27:07,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:07,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:27:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:27:07,801 INFO L87 Difference]: Start difference. First operand 163 states and 191 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:07,934 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2021-11-21 01:27:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:27:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-21 01:27:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:07,936 INFO L225 Difference]: With dead ends: 165 [2021-11-21 01:27:07,936 INFO L226 Difference]: Without dead ends: 148 [2021-11-21 01:27:07,936 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 01:27:07,937 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:07,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 241 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:27:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-21 01:27:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-21 01:27:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 145 states have internal predecessors, (159), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:27:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 173 transitions. [2021-11-21 01:27:07,949 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 173 transitions. Word has length 40 [2021-11-21 01:27:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:07,949 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 173 transitions. [2021-11-21 01:27:07,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 173 transitions. [2021-11-21 01:27:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:27:07,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:07,950 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:07,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-21 01:27:07,951 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash 455721488, now seen corresponding path program 1 times [2021-11-21 01:27:07,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:07,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363784532] [2021-11-21 01:27:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:07,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:08,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363784532] [2021-11-21 01:27:08,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363784532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:08,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:08,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:27:08,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601628716] [2021-11-21 01:27:08,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:08,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:27:08,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:27:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:27:08,006 INFO L87 Difference]: Start difference. First operand 148 states and 173 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:08,237 INFO L93 Difference]: Finished difference Result 203 states and 246 transitions. [2021-11-21 01:27:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:27:08,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-21 01:27:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:08,239 INFO L225 Difference]: With dead ends: 203 [2021-11-21 01:27:08,239 INFO L226 Difference]: Without dead ends: 160 [2021-11-21 01:27:08,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:27:08,241 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:08,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 218 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:27:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-21 01:27:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2021-11-21 01:27:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 151 states have internal predecessors, (166), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:27:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 180 transitions. [2021-11-21 01:27:08,258 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 180 transitions. Word has length 41 [2021-11-21 01:27:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:08,259 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 180 transitions. [2021-11-21 01:27:08,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 180 transitions. [2021-11-21 01:27:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:27:08,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:08,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:08,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-21 01:27:08,261 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2056522135, now seen corresponding path program 2 times [2021-11-21 01:27:08,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:08,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499302295] [2021-11-21 01:27:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:08,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:27:08,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:08,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499302295] [2021-11-21 01:27:08,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499302295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:08,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:08,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:27:08,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504900721] [2021-11-21 01:27:08,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:08,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:27:08,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:08,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:27:08,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:27:08,378 INFO L87 Difference]: Start difference. First operand 154 states and 180 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:08,732 INFO L93 Difference]: Finished difference Result 220 states and 264 transitions. [2021-11-21 01:27:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:27:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-21 01:27:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:08,734 INFO L225 Difference]: With dead ends: 220 [2021-11-21 01:27:08,734 INFO L226 Difference]: Without dead ends: 177 [2021-11-21 01:27:08,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:27:08,735 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 69 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:08,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 285 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:27:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-21 01:27:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2021-11-21 01:27:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 147 states have internal predecessors, (161), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:27:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2021-11-21 01:27:08,748 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 46 [2021-11-21 01:27:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:08,748 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2021-11-21 01:27:08,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2021-11-21 01:27:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:27:08,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:08,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:08,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-21 01:27:08,750 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1973952626, now seen corresponding path program 1 times [2021-11-21 01:27:08,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:08,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864940708] [2021-11-21 01:27:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:08,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:27:08,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:08,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864940708] [2021-11-21 01:27:08,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864940708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:27:08,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087430475] [2021-11-21 01:27:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:08,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:08,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:08,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:08,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:27:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:27:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:09,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 01:27:09,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-21 01:27:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:27:09,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:27:09,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087430475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:09,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391633484] [2021-11-21 01:27:09,336 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2021-11-21 01:27:09,336 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:27:09,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:27:09,337 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:27:09,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:27:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:09,451 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:27:09,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:27:09,521 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:27:09,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:27:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:27:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:27:09,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:09,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 64 [2021-11-21 01:27:09,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-11-21 01:27:09,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:10,208 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:27:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 471 [2021-11-21 01:27:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:10,480 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:27:10,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 471 treesize of output 542 [2021-11-21 01:27:10,577 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-21 01:27:10,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 542 treesize of output 532 [2021-11-21 01:27:10,942 INFO L354 Elim1Store]: treesize reduction 200, result has 30.6 percent of original size [2021-11-21 01:27:10,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 535 treesize of output 603 [2021-11-21 01:27:11,189 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-21 01:27:11,190 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 10 case distinctions, treesize of input 594 treesize of output 625 [2021-11-21 01:27:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:11,297 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-21 01:27:11,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 623 treesize of output 615 [2021-11-21 01:27:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:11,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:11,423 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:27:11,423 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 7 case distinctions, treesize of input 620 treesize of output 607 [2021-11-21 01:27:11,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:11,742 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:27:11,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 612 treesize of output 675 [2021-11-21 01:27:11,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:11,938 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:27:11,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 687 treesize of output 750 [2021-11-21 01:27:26,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:26,010 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:27:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 48 [2021-11-21 01:27:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:26,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:26,024 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:27:26,025 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 51 treesize of output 36 [2021-11-21 01:27:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:26,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:26,078 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:27:26,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:27:26,105 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:27:26,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:27:26,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:26,144 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:27:26,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:27:26,188 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:27:26,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:27:27,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:27,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:27,775 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:27:27,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:27:27,811 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:27:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:27:27,840 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:27:27,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:27:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:27,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:27:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:27,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:27:27,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:27:27,941 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:27:29,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1391633484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:29,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:27:29,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [6, 8, 8] total 26 [2021-11-21 01:27:29,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379708932] [2021-11-21 01:27:29,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:29,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:27:29,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:29,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:27:29,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:27:29,042 INFO L87 Difference]: Start difference. First operand 150 states and 175 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:27:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:30,881 INFO L93 Difference]: Finished difference Result 243 states and 297 transitions. [2021-11-21 01:27:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:27:30,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-21 01:27:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:30,883 INFO L225 Difference]: With dead ends: 243 [2021-11-21 01:27:30,883 INFO L226 Difference]: Without dead ends: 174 [2021-11-21 01:27:30,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:27:30,884 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 120 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:30,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 290 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:27:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-21 01:27:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 147. [2021-11-21 01:27:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 144 states have internal predecessors, (155), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:27:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2021-11-21 01:27:30,904 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 47 [2021-11-21 01:27:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:30,904 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2021-11-21 01:27:30,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:27:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2021-11-21 01:27:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:27:30,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:30,905 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:30,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-21 01:27:31,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-21 01:27:31,106 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:31,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1947936752, now seen corresponding path program 3 times [2021-11-21 01:27:31,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:31,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28241859] [2021-11-21 01:27:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:31,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:31,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:31,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28241859] [2021-11-21 01:27:31,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28241859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:27:31,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810111463] [2021-11-21 01:27:31,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:27:31,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:31,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:31,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:27:31,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:27:31,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-21 01:27:31,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:31,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:31,647 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 30 treesize of output 30 [2021-11-21 01:27:31,657 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:27:31,657 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 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-21 01:27:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:31,773 INFO L354 Elim1Store]: treesize reduction 250, result has 8.8 percent of original size [2021-11-21 01:27:31,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 92 [2021-11-21 01:27:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:31,777 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 102 treesize of output 102 [2021-11-21 01:27:31,824 INFO L354 Elim1Store]: treesize reduction 276, result has 22.9 percent of original size [2021-11-21 01:27:31,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 145 [2021-11-21 01:27:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:31,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:32,110 INFO L354 Elim1Store]: treesize reduction 691, result has 6.6 percent of original size [2021-11-21 01:27:32,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 216 treesize of output 176 [2021-11-21 01:27:32,148 INFO L354 Elim1Store]: treesize reduction 298, result has 11.3 percent of original size [2021-11-21 01:27:32,148 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 4 case distinctions, treesize of input 305 treesize of output 288 [2021-11-21 01:27:32,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:32,179 INFO L354 Elim1Store]: treesize reduction 200, result has 16.0 percent of original size [2021-11-21 01:27:32,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 282 treesize of output 291 [2021-11-21 01:27:32,216 INFO L354 Elim1Store]: treesize reduction 236, result has 30.8 percent of original size [2021-11-21 01:27:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 332 [2021-11-21 01:27:34,597 INFO L354 Elim1Store]: treesize reduction 162, result has 1.8 percent of original size [2021-11-21 01:27:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 267 [2021-11-21 01:27:35,257 INFO L354 Elim1Store]: treesize reduction 152, result has 7.9 percent of original size [2021-11-21 01:27:35,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 246 treesize of output 86 [2021-11-21 01:27:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:36,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810111463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190279750] [2021-11-21 01:27:36,368 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:27:36,368 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:27:36,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:27:36,369 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:27:36,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:27:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,490 INFO L354 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2021-11-21 01:27:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 75 [2021-11-21 01:27:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,511 INFO L354 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2021-11-21 01:27:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 63 [2021-11-21 01:27:36,599 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:27:36,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:27:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:27:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:36,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:27:36,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:27:36,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:37,353 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:27:37,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 471 [2021-11-21 01:27:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:37,656 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:27:37,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 471 treesize of output 542 [2021-11-21 01:27:37,747 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-21 01:27:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 542 treesize of output 532 [2021-11-21 01:27:38,106 INFO L354 Elim1Store]: treesize reduction 200, result has 30.6 percent of original size [2021-11-21 01:27:38,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 535 treesize of output 603 [2021-11-21 01:27:38,314 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-21 01:27:38,315 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 10 case distinctions, treesize of input 594 treesize of output 625 [2021-11-21 01:27:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:38,424 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-21 01:27:38,425 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 4 case distinctions, treesize of input 623 treesize of output 615 [2021-11-21 01:27:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:38,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:38,501 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:27:38,502 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 7 case distinctions, treesize of input 620 treesize of output 607 [2021-11-21 01:27:38,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:38,700 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:27:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 612 treesize of output 675 [2021-11-21 01:27:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:38,872 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:27:38,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 687 treesize of output 750 [2021-11-21 01:27:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:52,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:52,938 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:27:52,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:27:52,994 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:27:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:27:53,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:27:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:27:53,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:27:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:53,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:27:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:56,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:27:56,211 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:27:56,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:27:56,243 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:27:56,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:27:56,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:27:56,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:56,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:27:56,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:27:56,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:27:56,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:27:56,362 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 22 for LOIs [2021-11-21 01:27:56,377 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:27:57,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:27:57,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:27:57,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 23 [2021-11-21 01:27:57,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298116001] [2021-11-21 01:27:57,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:57,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:27:57,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:27:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:27:57,489 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:59,732 INFO L93 Difference]: Finished difference Result 179 states and 205 transitions. [2021-11-21 01:27:59,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:27:59,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-21 01:27:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:59,734 INFO L225 Difference]: With dead ends: 179 [2021-11-21 01:27:59,734 INFO L226 Difference]: Without dead ends: 176 [2021-11-21 01:27:59,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=313, Invalid=2237, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 01:27:59,736 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 113 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:59,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 919 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 427 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2021-11-21 01:27:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-21 01:27:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 158. [2021-11-21 01:27:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.143835616438356) internal successors, (167), 155 states have internal predecessors, (167), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:27:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2021-11-21 01:27:59,754 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 51 [2021-11-21 01:27:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:59,754 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2021-11-21 01:27:59,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2021-11-21 01:27:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:27:59,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:59,755 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:59,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:59,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-21 01:27:59,956 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:27:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1161000271, now seen corresponding path program 2 times [2021-11-21 01:27:59,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273279521] [2021-11-21 01:27:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:59,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:28:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:00,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:28:00,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273279521] [2021-11-21 01:28:00,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273279521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:28:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087159592] [2021-11-21 01:28:00,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:28:00,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:28:00,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:28:00,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:28:00,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:28:00,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:28:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:28:00,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-21 01:28:00,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:28:00,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:00,347 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 30 treesize of output 30 [2021-11-21 01:28:00,355 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:28:00,356 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 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-21 01:28:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:00,438 INFO L354 Elim1Store]: treesize reduction 250, result has 8.8 percent of original size [2021-11-21 01:28:00,439 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 3 case distinctions, treesize of input 103 treesize of output 92 [2021-11-21 01:28:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:00,448 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 102 treesize of output 102 [2021-11-21 01:28:00,492 INFO L354 Elim1Store]: treesize reduction 276, result has 22.9 percent of original size [2021-11-21 01:28:00,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 145 [2021-11-21 01:28:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:00,776 INFO L354 Elim1Store]: treesize reduction 691, result has 6.6 percent of original size [2021-11-21 01:28:00,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 212 treesize of output 172 [2021-11-21 01:28:00,816 INFO L354 Elim1Store]: treesize reduction 298, result has 11.3 percent of original size [2021-11-21 01:28:00,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 297 treesize of output 280 [2021-11-21 01:28:00,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:00,846 INFO L354 Elim1Store]: treesize reduction 200, result has 16.0 percent of original size [2021-11-21 01:28:00,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 283 [2021-11-21 01:28:00,884 INFO L354 Elim1Store]: treesize reduction 236, result has 30.8 percent of original size [2021-11-21 01:28:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 276 treesize of output 324 [2021-11-21 01:28:03,218 INFO L354 Elim1Store]: treesize reduction 162, result has 1.8 percent of original size [2021-11-21 01:28:03,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 302 treesize of output 259 [2021-11-21 01:28:03,800 INFO L354 Elim1Store]: treesize reduction 152, result has 7.9 percent of original size [2021-11-21 01:28:03,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 238 treesize of output 82 [2021-11-21 01:28:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:03,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:28:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:04,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087159592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:28:04,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620414557] [2021-11-21 01:28:04,694 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-21 01:28:04,694 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:28:04,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:28:04,695 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:28:04,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:28:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:04,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:04,795 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:28:04,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 37 [2021-11-21 01:28:04,866 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:28:04,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-21 01:28:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:04,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 64 [2021-11-21 01:28:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-11-21 01:28:04,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:04,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:04,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:28:04,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:28:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:05,468 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:28:05,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 400 treesize of output 471 [2021-11-21 01:28:05,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:05,880 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-21 01:28:05,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 471 treesize of output 542 [2021-11-21 01:28:05,996 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-21 01:28:05,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 542 treesize of output 532 [2021-11-21 01:28:06,222 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-21 01:28:06,222 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 10 case distinctions, treesize of input 534 treesize of output 565 [2021-11-21 01:28:06,572 INFO L354 Elim1Store]: treesize reduction 216, result has 25.0 percent of original size [2021-11-21 01:28:06,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 564 treesize of output 616 [2021-11-21 01:28:06,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:06,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:06,682 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-21 01:28:06,682 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 4 case distinctions, treesize of input 607 treesize of output 599 [2021-11-21 01:28:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:06,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:06,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:06,767 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:28:06,767 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 7 case distinctions, treesize of input 604 treesize of output 591 [2021-11-21 01:28:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:06,982 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:28:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 596 treesize of output 659 [2021-11-21 01:28:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:07,160 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-21 01:28:07,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 671 treesize of output 734 [2021-11-21 01:28:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:20,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:20,903 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-21 01:28:20,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:28:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:20,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:20,978 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-21 01:28:20,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2021-11-21 01:28:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:21,021 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:28:21,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 48 [2021-11-21 01:28:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:21,041 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-21 01:28:21,042 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 51 treesize of output 36 [2021-11-21 01:28:21,099 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:28:21,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:28:21,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:28:24,968 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:28:24,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-21 01:28:24,991 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 01:28:24,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-21 01:28:25,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:25,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:25,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-21 01:28:25,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-21 01:28:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:25,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-11-21 01:28:25,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:28:25,094 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 33 for LOIs [2021-11-21 01:28:25,153 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:28:26,883 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:28:26,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:28:26,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2021-11-21 01:28:26,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480294151] [2021-11-21 01:28:26,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:28:26,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:28:26,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:28:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:28:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1491, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:28:26,886 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:28:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:28:28,353 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2021-11-21 01:28:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:28:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-21 01:28:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:28:28,355 INFO L225 Difference]: With dead ends: 179 [2021-11-21 01:28:28,355 INFO L226 Difference]: Without dead ends: 176 [2021-11-21 01:28:28,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 01:28:28,357 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 130 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:28:28,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 732 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 314 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2021-11-21 01:28:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-21 01:28:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2021-11-21 01:28:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 153 states have (on average 1.1372549019607843) internal successors, (174), 162 states have internal predecessors, (174), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:28:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2021-11-21 01:28:28,380 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 51 [2021-11-21 01:28:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:28:28,380 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2021-11-21 01:28:28,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:28:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2021-11-21 01:28:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:28:28,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:28:28,382 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:28:28,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:28:28,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-21 01:28:28,599 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:28:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:28:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1846926731, now seen corresponding path program 2 times [2021-11-21 01:28:28,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:28:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789870552] [2021-11-21 01:28:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:28:28,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:28:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:28:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:30,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:28:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789870552] [2021-11-21 01:28:30,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789870552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:28:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169793705] [2021-11-21 01:28:30,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:28:30,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:28:30,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:28:30,276 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:28:30,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20b5fa8e-28c4-4fc6-b295-c83953b0f500/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:28:30,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:28:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:28:30,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-21 01:28:30,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:28:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:30,442 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 26 treesize of output 26 [2021-11-21 01:28:30,450 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:28:30,450 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-11-21 01:28:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:30,458 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 16 treesize of output 17 [2021-11-21 01:28:30,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:28:30,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:30,615 INFO L354 Elim1Store]: treesize reduction 331, result has 8.6 percent of original size [2021-11-21 01:28:30,615 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 5 case distinctions, treesize of input 131 treesize of output 127 [2021-11-21 01:28:30,644 INFO L354 Elim1Store]: treesize reduction 166, result has 13.1 percent of original size [2021-11-21 01:28:30,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 128 [2021-11-21 01:28:30,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:30,670 INFO L354 Elim1Store]: treesize reduction 144, result has 14.8 percent of original size [2021-11-21 01:28:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 131 [2021-11-21 01:28:30,724 INFO L354 Elim1Store]: treesize reduction 276, result has 22.9 percent of original size [2021-11-21 01:28:30,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 172 [2021-11-21 01:28:30,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:31,090 INFO L354 Elim1Store]: treesize reduction 465, result has 10.4 percent of original size [2021-11-21 01:28:31,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 229 treesize of output 190 [2021-11-21 01:28:31,154 INFO L354 Elim1Store]: treesize reduction 418, result has 12.7 percent of original size [2021-11-21 01:28:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 336 treesize of output 322 [2021-11-21 01:28:31,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:31,223 INFO L354 Elim1Store]: treesize reduction 428, result has 14.4 percent of original size [2021-11-21 01:28:31,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 317 treesize of output 325 [2021-11-21 01:28:31,272 INFO L354 Elim1Store]: treesize reduction 236, result has 30.8 percent of original size [2021-11-21 01:28:31,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 318 treesize of output 366 [2021-11-21 01:28:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:35,688 INFO L328 TraceCheckSpWp]: Computing backward predicates...