./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --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_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/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_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/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_60f9f14a-e007-446f-8e73-8514915413cb/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 bbcb02f84aadc49a5c6c6cd26449c15fd97ea67d08608a672ddfc36ff8b8eddf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:27:40,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:27:40,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:27:40,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:27:40,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:27:40,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:27:40,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:27:40,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:27:40,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:27:40,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:27:40,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:27:40,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:27:40,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:27:40,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:27:40,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:27:40,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:27:40,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:27:40,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:27:40,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:27:40,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:27:40,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:27:40,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:27:40,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:27:40,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:27:40,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:27:40,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:27:40,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:27:40,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:27:40,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:27:40,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:27:40,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:27:40,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:27:40,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:27:40,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:27:40,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:27:40,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:27:40,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:27:40,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:27:40,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:27:40,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:27:40,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:27:40,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:27:40,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:27:40,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:27:40,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:27:40,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:27:40,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:27:40,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:27:40,320 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:27:40,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:27:40,321 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:27:40,321 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:27:40,321 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:27:40,321 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:27:40,321 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:27:40,322 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:27:40,322 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:27:40,322 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:27:40,322 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:27:40,322 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:27:40,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:27:40,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:27:40,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:27:40,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:27:40,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:27:40,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:27:40,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:27:40,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:27:40,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:27:40,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:27:40,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:27:40,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:27:40,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:27:40,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:27:40,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:27:40,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:27:40,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:27:40,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:27:40,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:27:40,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:27:40,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:27:40,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:27:40,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:27:40,327 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_60f9f14a-e007-446f-8e73-8514915413cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbcb02f84aadc49a5c6c6cd26449c15fd97ea67d08608a672ddfc36ff8b8eddf [2021-11-21 00:27:40,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:27:40,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:27:40,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:27:40,596 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:27:40,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:27:40,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 00:27:40,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/data/7e5433de2/cc17b0e7cbdb431ab791b0f9b58f7d1e/FLAG278dafa21 [2021-11-21 00:27:41,338 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:27:41,338 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 00:27:41,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/data/7e5433de2/cc17b0e7cbdb431ab791b0f9b58f7d1e/FLAG278dafa21 [2021-11-21 00:27:41,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/data/7e5433de2/cc17b0e7cbdb431ab791b0f9b58f7d1e [2021-11-21 00:27:41,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:27:41,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:27:41,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:27:41,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:27:41,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:27:41,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:27:41" (1/1) ... [2021-11-21 00:27:41,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd3443b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:41, skipping insertion in model container [2021-11-21 00:27:41,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:27:41" (1/1) ... [2021-11-21 00:27:41,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:27:41,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:27:42,278 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_60f9f14a-e007-446f-8e73-8514915413cb/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34857,34870] [2021-11-21 00:27:42,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:27:42,489 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:27:42,863 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_60f9f14a-e007-446f-8e73-8514915413cb/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34857,34870] [2021-11-21 00:27:43,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:27:43,035 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:27:43,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43 WrapperNode [2021-11-21 00:27:43,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:27:43,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:27:43,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:27:43,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:27:43,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,193 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2907 [2021-11-21 00:27:43,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:27:43,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:27:43,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:27:43,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:27:43,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:27:43,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:27:43,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:27:43,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:27:43,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (1/1) ... [2021-11-21 00:27:43,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:27:43,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:27:43,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:27:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f9f14a-e007-446f-8e73-8514915413cb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:27:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:27:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:27:43,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:27:43,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:27:43,633 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:27:43,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:27:45,606 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:27:46,439 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:27:46,439 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:27:46,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:27:46 BoogieIcfgContainer [2021-11-21 00:27:46,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:27:46,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:27:46,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:27:46,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:27:46,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:27:41" (1/3) ... [2021-11-21 00:27:46,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f31f81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:27:46, skipping insertion in model container [2021-11-21 00:27:46,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:43" (2/3) ... [2021-11-21 00:27:46,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f31f81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:27:46, skipping insertion in model container [2021-11-21 00:27:46,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:27:46" (3/3) ... [2021-11-21 00:27:46,453 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 00:27:46,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:27:46,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:27:46,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:27:46,533 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 00:27:46,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:27:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 623 states, 621 states have (on average 1.7246376811594204) internal successors, (1071), 622 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-21 00:27:46,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:46,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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 00:27:46,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:46,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1095240098, now seen corresponding path program 1 times [2021-11-21 00:27:46,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:46,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254814318] [2021-11-21 00:27:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:46,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:47,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254814318] [2021-11-21 00:27:47,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254814318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:47,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:47,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:47,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549311506] [2021-11-21 00:27:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:47,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:47,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:47,852 INFO L87 Difference]: Start difference. First operand has 623 states, 621 states have (on average 1.7246376811594204) internal successors, (1071), 622 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:48,440 INFO L93 Difference]: Finished difference Result 1833 states and 3154 transitions. [2021-11-21 00:27:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-11-21 00:27:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:48,474 INFO L225 Difference]: With dead ends: 1833 [2021-11-21 00:27:48,475 INFO L226 Difference]: Without dead ends: 1215 [2021-11-21 00:27:48,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:27:48,491 INFO L933 BasicCegarLoop]: 1542 mSDtfsCounter, 2489 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:48,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2489 Valid, 2506 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:27:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-11-21 00:27:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1213. [2021-11-21 00:27:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 1.452970297029703) internal successors, (1761), 1212 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1761 transitions. [2021-11-21 00:27:48,662 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1761 transitions. Word has length 257 [2021-11-21 00:27:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:48,664 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1761 transitions. [2021-11-21 00:27:48,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1761 transitions. [2021-11-21 00:27:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-21 00:27:48,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:48,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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 00:27:48,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:27:48,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2123087533, now seen corresponding path program 1 times [2021-11-21 00:27:48,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:48,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396944616] [2021-11-21 00:27:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:48,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:48,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396944616] [2021-11-21 00:27:48,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396944616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:48,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:48,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:48,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463986132] [2021-11-21 00:27:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:48,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:48,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:48,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:48,923 INFO L87 Difference]: Start difference. First operand 1213 states and 1761 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:49,274 INFO L93 Difference]: Finished difference Result 3470 states and 5017 transitions. [2021-11-21 00:27:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-11-21 00:27:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:49,292 INFO L225 Difference]: With dead ends: 3470 [2021-11-21 00:27:49,292 INFO L226 Difference]: Without dead ends: 2378 [2021-11-21 00:27:49,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:49,300 INFO L933 BasicCegarLoop]: 1667 mSDtfsCounter, 793 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:49,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 2484 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-11-21 00:27:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2376. [2021-11-21 00:27:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 1.4463157894736842) internal successors, (3435), 2375 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3435 transitions. [2021-11-21 00:27:49,455 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3435 transitions. Word has length 259 [2021-11-21 00:27:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:49,456 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 3435 transitions. [2021-11-21 00:27:49,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3435 transitions. [2021-11-21 00:27:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-21 00:27:49,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:49,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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 00:27:49,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:27:49,465 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash 938585026, now seen corresponding path program 1 times [2021-11-21 00:27:49,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:49,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723210177] [2021-11-21 00:27:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:49,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:49,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723210177] [2021-11-21 00:27:49,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723210177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:49,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:49,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:49,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119833642] [2021-11-21 00:27:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:49,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:49,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:49,542 INFO L87 Difference]: Start difference. First operand 2376 states and 3435 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:49,957 INFO L93 Difference]: Finished difference Result 6976 states and 10072 transitions. [2021-11-21 00:27:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:49,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-11-21 00:27:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:49,983 INFO L225 Difference]: With dead ends: 6976 [2021-11-21 00:27:49,983 INFO L226 Difference]: Without dead ends: 4732 [2021-11-21 00:27:49,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:49,989 INFO L933 BasicCegarLoop]: 1710 mSDtfsCounter, 897 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:49,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 2563 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-11-21 00:27:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 2379. [2021-11-21 00:27:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 1.445752733389403) internal successors, (3438), 2378 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3438 transitions. [2021-11-21 00:27:50,206 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3438 transitions. Word has length 259 [2021-11-21 00:27:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:50,206 INFO L470 AbstractCegarLoop]: Abstraction has 2379 states and 3438 transitions. [2021-11-21 00:27:50,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3438 transitions. [2021-11-21 00:27:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-21 00:27:50,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:50,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1] [2021-11-21 00:27:50,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:27:50,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash 812025838, now seen corresponding path program 1 times [2021-11-21 00:27:50,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:50,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507124969] [2021-11-21 00:27:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:50,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:50,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:50,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507124969] [2021-11-21 00:27:50,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507124969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:50,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:50,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:27:50,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9489001] [2021-11-21 00:27:50,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:50,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:27:50,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:27:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:27:50,671 INFO L87 Difference]: Start difference. First operand 2379 states and 3438 transitions. Second operand has 5 states, 5 states have (on average 52.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:51,255 INFO L93 Difference]: Finished difference Result 6903 states and 9953 transitions. [2021-11-21 00:27:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-11-21 00:27:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:51,283 INFO L225 Difference]: With dead ends: 6903 [2021-11-21 00:27:51,283 INFO L226 Difference]: Without dead ends: 4539 [2021-11-21 00:27:51,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:27:51,299 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 1750 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:51,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 2908 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:27:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4539 states. [2021-11-21 00:27:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4539 to 4537. [2021-11-21 00:27:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4536 states have (on average 1.4332010582010581) internal successors, (6501), 4536 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 6501 transitions. [2021-11-21 00:27:51,703 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 6501 transitions. Word has length 260 [2021-11-21 00:27:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:51,705 INFO L470 AbstractCegarLoop]: Abstraction has 4537 states and 6501 transitions. [2021-11-21 00:27:51,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 6501 transitions. [2021-11-21 00:27:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-21 00:27:51,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:51,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1, 1] [2021-11-21 00:27:51,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:27:51,719 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1988818873, now seen corresponding path program 1 times [2021-11-21 00:27:51,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:51,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244011415] [2021-11-21 00:27:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:51,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:52,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244011415] [2021-11-21 00:27:52,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244011415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:52,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:52,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:52,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479418733] [2021-11-21 00:27:52,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:52,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:52,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:52,136 INFO L87 Difference]: Start difference. First operand 4537 states and 6501 transitions. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:52,994 INFO L93 Difference]: Finished difference Result 13255 states and 18954 transitions. [2021-11-21 00:27:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2021-11-21 00:27:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:53,044 INFO L225 Difference]: With dead ends: 13255 [2021-11-21 00:27:53,044 INFO L226 Difference]: Without dead ends: 8856 [2021-11-21 00:27:53,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:27:53,055 INFO L933 BasicCegarLoop]: 1285 mSDtfsCounter, 2073 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:53,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 2096 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2021-11-21 00:27:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 8854. [2021-11-21 00:27:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8854 states, 8853 states have (on average 1.4235852253473398) internal successors, (12603), 8853 states have internal predecessors, (12603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8854 states to 8854 states and 12603 transitions. [2021-11-21 00:27:53,749 INFO L78 Accepts]: Start accepts. Automaton has 8854 states and 12603 transitions. Word has length 261 [2021-11-21 00:27:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:53,751 INFO L470 AbstractCegarLoop]: Abstraction has 8854 states and 12603 transitions. [2021-11-21 00:27:53,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8854 states and 12603 transitions. [2021-11-21 00:27:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-21 00:27:53,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:53,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1] [2021-11-21 00:27:53,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:27:53,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash 700356849, now seen corresponding path program 1 times [2021-11-21 00:27:53,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:53,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729398870] [2021-11-21 00:27:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:53,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:54,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729398870] [2021-11-21 00:27:54,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729398870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:54,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:54,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:54,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094344315] [2021-11-21 00:27:54,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:54,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:54,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:54,134 INFO L87 Difference]: Start difference. First operand 8854 states and 12603 transitions. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:55,444 INFO L93 Difference]: Finished difference Result 25958 states and 36872 transitions. [2021-11-21 00:27:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-21 00:27:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:55,514 INFO L225 Difference]: With dead ends: 25958 [2021-11-21 00:27:55,515 INFO L226 Difference]: Without dead ends: 17246 [2021-11-21 00:27:55,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:27:55,531 INFO L933 BasicCegarLoop]: 1114 mSDtfsCounter, 2214 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2214 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:55,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2214 Valid, 1917 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17246 states. [2021-11-21 00:27:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17246 to 17244. [2021-11-21 00:27:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17244 states, 17243 states have (on average 1.4118192889868353) internal successors, (24344), 17243 states have internal predecessors, (24344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17244 states to 17244 states and 24344 transitions. [2021-11-21 00:27:56,756 INFO L78 Accepts]: Start accepts. Automaton has 17244 states and 24344 transitions. Word has length 263 [2021-11-21 00:27:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:56,756 INFO L470 AbstractCegarLoop]: Abstraction has 17244 states and 24344 transitions. [2021-11-21 00:27:56,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17244 states and 24344 transitions. [2021-11-21 00:27:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-21 00:27:56,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:56,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:56,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:27:56,794 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1733168025, now seen corresponding path program 1 times [2021-11-21 00:27:56,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195041692] [2021-11-21 00:27:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:56,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:56,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:56,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195041692] [2021-11-21 00:27:56,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195041692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:56,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:56,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:56,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154826881] [2021-11-21 00:27:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:56,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:56,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:56,908 INFO L87 Difference]: Start difference. First operand 17244 states and 24344 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:59,016 INFO L93 Difference]: Finished difference Result 49399 states and 69425 transitions. [2021-11-21 00:27:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-21 00:27:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:59,108 INFO L225 Difference]: With dead ends: 49399 [2021-11-21 00:27:59,108 INFO L226 Difference]: Without dead ends: 33717 [2021-11-21 00:27:59,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:59,138 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 776 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:59,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 2463 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:27:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33717 states. [2021-11-21 00:28:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33717 to 33715. [2021-11-21 00:28:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33715 states, 33714 states have (on average 1.4033042652903838) internal successors, (47311), 33714 states have internal predecessors, (47311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33715 states to 33715 states and 47311 transitions. [2021-11-21 00:28:01,600 INFO L78 Accepts]: Start accepts. Automaton has 33715 states and 47311 transitions. Word has length 265 [2021-11-21 00:28:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:28:01,601 INFO L470 AbstractCegarLoop]: Abstraction has 33715 states and 47311 transitions. [2021-11-21 00:28:01,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 33715 states and 47311 transitions. [2021-11-21 00:28:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-21 00:28:01,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:28:01,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2021-11-21 00:28:01,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:28:01,669 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:28:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:28:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash -892323273, now seen corresponding path program 1 times [2021-11-21 00:28:01,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:28:01,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188511290] [2021-11-21 00:28:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:01,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:28:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:28:01,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:28:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188511290] [2021-11-21 00:28:01,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188511290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:28:01,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:28:01,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:28:01,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523128317] [2021-11-21 00:28:01,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:28:01,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:28:01,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:28:01,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:28:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:28:01,734 INFO L87 Difference]: Start difference. First operand 33715 states and 47311 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:28:04,743 INFO L93 Difference]: Finished difference Result 99210 states and 139051 transitions. [2021-11-21 00:28:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:28:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-21 00:28:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:28:04,928 INFO L225 Difference]: With dead ends: 99210 [2021-11-21 00:28:04,930 INFO L226 Difference]: Without dead ends: 67181 [2021-11-21 00:28:05,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:28:05,010 INFO L933 BasicCegarLoop]: 1689 mSDtfsCounter, 873 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:28:05,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 2542 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:28:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67181 states. [2021-11-21 00:28:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67181 to 33748. [2021-11-21 00:28:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33748 states, 33747 states have (on average 1.4029098882863662) internal successors, (47344), 33747 states have internal predecessors, (47344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33748 states to 33748 states and 47344 transitions. [2021-11-21 00:28:07,726 INFO L78 Accepts]: Start accepts. Automaton has 33748 states and 47344 transitions. Word has length 265 [2021-11-21 00:28:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:28:07,727 INFO L470 AbstractCegarLoop]: Abstraction has 33748 states and 47344 transitions. [2021-11-21 00:28:07,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 33748 states and 47344 transitions. [2021-11-21 00:28:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-21 00:28:07,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:28:07,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:28:07,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:28:07,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:28:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:28:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -488582661, now seen corresponding path program 1 times [2021-11-21 00:28:07,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:28:07,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712567874] [2021-11-21 00:28:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:07,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:28:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:28:07,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:28:07,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712567874] [2021-11-21 00:28:07,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712567874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:28:07,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:28:07,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:28:07,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978363881] [2021-11-21 00:28:07,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:28:07,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:28:07,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:28:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:28:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:28:07,928 INFO L87 Difference]: Start difference. First operand 33748 states and 47344 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:28:10,401 INFO L93 Difference]: Finished difference Result 70552 states and 100466 transitions. [2021-11-21 00:28:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:28:10,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-21 00:28:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:28:10,468 INFO L225 Difference]: With dead ends: 70552 [2021-11-21 00:28:10,468 INFO L226 Difference]: Without dead ends: 46166 [2021-11-21 00:28:10,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:28:10,497 INFO L933 BasicCegarLoop]: 1169 mSDtfsCounter, 511 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:28:10,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 1807 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:28:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46166 states. [2021-11-21 00:28:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46166 to 39124. [2021-11-21 00:28:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39124 states, 39123 states have (on average 1.4277023745622779) internal successors, (55856), 39123 states have internal predecessors, (55856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39124 states to 39124 states and 55856 transitions. [2021-11-21 00:28:12,783 INFO L78 Accepts]: Start accepts. Automaton has 39124 states and 55856 transitions. Word has length 266 [2021-11-21 00:28:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:28:12,783 INFO L470 AbstractCegarLoop]: Abstraction has 39124 states and 55856 transitions. [2021-11-21 00:28:12,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 39124 states and 55856 transitions. [2021-11-21 00:28:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-21 00:28:12,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:28:12,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:28:12,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:28:12,835 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:28:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:28:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2008077073, now seen corresponding path program 1 times [2021-11-21 00:28:12,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:28:12,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159755949] [2021-11-21 00:28:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:12,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:28:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:28:13,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:28:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159755949] [2021-11-21 00:28:13,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159755949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:28:13,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:28:13,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:28:13,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64022852] [2021-11-21 00:28:13,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:28:13,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:28:13,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:28:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:28:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:28:13,343 INFO L87 Difference]: Start difference. First operand 39124 states and 55856 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:28:17,844 INFO L93 Difference]: Finished difference Result 113895 states and 162399 transitions. [2021-11-21 00:28:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:28:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-21 00:28:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:28:17,961 INFO L225 Difference]: With dead ends: 113895 [2021-11-21 00:28:17,961 INFO L226 Difference]: Without dead ends: 74971 [2021-11-21 00:28:18,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:28:18,007 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 1723 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:28:18,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 3042 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:28:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74971 states. [2021-11-21 00:28:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74971 to 74969. [2021-11-21 00:28:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74969 states, 74968 states have (on average 1.4186186106071923) internal successors, (106351), 74968 states have internal predecessors, (106351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74969 states to 74969 states and 106351 transitions. [2021-11-21 00:28:23,156 INFO L78 Accepts]: Start accepts. Automaton has 74969 states and 106351 transitions. Word has length 266 [2021-11-21 00:28:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:28:23,156 INFO L470 AbstractCegarLoop]: Abstraction has 74969 states and 106351 transitions. [2021-11-21 00:28:23,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 74969 states and 106351 transitions. [2021-11-21 00:28:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-21 00:28:23,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:28:23,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:28:23,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:28:23,262 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:28:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:28:23,263 INFO L85 PathProgramCache]: Analyzing trace with hash -241256187, now seen corresponding path program 1 times [2021-11-21 00:28:23,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:28:23,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211637437] [2021-11-21 00:28:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:23,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:28:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:28:23,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:28:23,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211637437] [2021-11-21 00:28:23,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211637437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:28:23,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:28:23,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:28:23,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701599669] [2021-11-21 00:28:23,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:28:23,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:28:23,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:28:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:28:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:28:23,608 INFO L87 Difference]: Start difference. First operand 74969 states and 106351 transitions. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:28:33,162 INFO L93 Difference]: Finished difference Result 216843 states and 306687 transitions. [2021-11-21 00:28:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:28:33,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-21 00:28:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:28:33,402 INFO L225 Difference]: With dead ends: 216843 [2021-11-21 00:28:33,403 INFO L226 Difference]: Without dead ends: 144138 [2021-11-21 00:28:33,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:28:33,477 INFO L933 BasicCegarLoop]: 1422 mSDtfsCounter, 1901 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:28:33,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 2235 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:28:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144138 states.