./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V --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 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:57:33,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:57:33,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:57:33,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:57:33,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:57:33,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:57:33,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:57:33,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:57:33,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:57:33,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:57:33,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:57:33,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:57:33,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:57:33,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:57:33,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:57:33,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:57:33,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:57:33,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:57:33,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:57:33,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:57:33,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:57:33,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:57:33,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:57:33,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:57:33,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:57:33,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:57:33,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:57:33,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:57:33,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:57:33,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:57:33,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:57:33,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:57:33,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:57:33,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:57:33,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:57:33,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:57:33,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:57:33,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:57:33,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:57:33,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:57:33,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:57:33,276 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:57:33,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:57:33,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:57:33,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:57:33,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:57:33,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:57:33,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:57:33,343 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:57:33,343 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:57:33,343 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:57:33,344 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:57:33,345 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:57:33,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:57:33,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:57:33,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:57:33,346 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:57:33,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:57:33,347 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:57:33,347 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:57:33,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:57:33,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:57:33,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:57:33,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:57:33,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:57:33,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:57:33,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:57:33,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:57:33,352 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:57:33,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:57:33,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:57:33,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:57:33,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:57:33,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:57:33,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:57:33,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:57:33,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:57:33,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:57:33,355 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:57:33,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:57:33,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:57:33,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:57:33,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:57:33,357 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_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 [2021-11-23 01:57:33,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:57:33,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:57:33,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:57:33,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:57:33,761 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:57:33,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2021-11-23 01:57:33,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/data/d21b24261/aaac45835e4d4da682387d6f31dfb279/FLAG5f256ab67 [2021-11-23 01:57:34,506 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:57:34,507 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2021-11-23 01:57:34,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/data/d21b24261/aaac45835e4d4da682387d6f31dfb279/FLAG5f256ab67 [2021-11-23 01:57:34,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/data/d21b24261/aaac45835e4d4da682387d6f31dfb279 [2021-11-23 01:57:34,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:57:34,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:57:34,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:57:34,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:57:34,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:57:34,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:57:34" (1/1) ... [2021-11-23 01:57:34,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7966a64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:34, skipping insertion in model container [2021-11-23 01:57:34,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:57:34" (1/1) ... [2021-11-23 01:57:34,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:57:34,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:57:35,140 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_886761f9-a09f-4034-813e-85ff76a0722d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2021-11-23 01:57:35,212 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_886761f9-a09f-4034-813e-85ff76a0722d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2021-11-23 01:57:35,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:57:35,267 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:57:35,281 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_886761f9-a09f-4034-813e-85ff76a0722d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2021-11-23 01:57:35,307 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_886761f9-a09f-4034-813e-85ff76a0722d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2021-11-23 01:57:35,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:57:35,360 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:57:35,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35 WrapperNode [2021-11-23 01:57:35,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:57:35,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:57:35,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:57:35,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:57:35,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,432 INFO L137 Inliner]: procedures = 57, calls = 63, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 460 [2021-11-23 01:57:35,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:57:35,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:57:35,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:57:35,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:57:35,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:57:35,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:57:35,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:57:35,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:57:35,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (1/1) ... [2021-11-23 01:57:35,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:57:35,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:35,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:57:35,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:57:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:57:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 01:57:35,625 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 01:57:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-11-23 01:57:35,625 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-11-23 01:57:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-23 01:57:35,626 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-23 01:57:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-23 01:57:35,626 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-23 01:57:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-11-23 01:57:35,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-11-23 01:57:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-23 01:57:35,627 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-23 01:57:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-23 01:57:35,627 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-23 01:57:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-11-23 01:57:35,628 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-11-23 01:57:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-11-23 01:57:35,628 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-11-23 01:57:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-11-23 01:57:35,628 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-11-23 01:57:35,629 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-23 01:57:35,629 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-23 01:57:35,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:57:35,629 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-23 01:57:35,629 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-23 01:57:35,630 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-11-23 01:57:35,630 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-11-23 01:57:35,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:57:35,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:57:35,630 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-23 01:57:35,631 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-23 01:57:35,732 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:57:35,734 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:57:36,502 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:57:36,694 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:57:36,694 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-23 01:57:36,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:57:36 BoogieIcfgContainer [2021-11-23 01:57:36,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:57:36,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:57:36,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:57:36,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:57:36,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:57:34" (1/3) ... [2021-11-23 01:57:36,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f3015e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:57:36, skipping insertion in model container [2021-11-23 01:57:36,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:35" (2/3) ... [2021-11-23 01:57:36,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f3015e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:57:36, skipping insertion in model container [2021-11-23 01:57:36,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:57:36" (3/3) ... [2021-11-23 01:57:36,709 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2021-11-23 01:57:36,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:57:36,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 01:57:36,787 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:57:36,794 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 [2021-11-23 01:57:36,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 01:57:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 109 states have internal predecessors, (153), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-23 01:57:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 01:57:36,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:36,831 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] [2021-11-23 01:57:36,832 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:36,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:36,839 INFO L85 PathProgramCache]: Analyzing trace with hash -808074872, now seen corresponding path program 1 times [2021-11-23 01:57:36,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:36,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652460047] [2021-11-23 01:57:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:36,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:37,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:37,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652460047] [2021-11-23 01:57:37,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652460047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:37,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:37,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:57:37,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144123059] [2021-11-23 01:57:37,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:37,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:37,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:37,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:37,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:37,208 INFO L87 Difference]: Start difference. First operand has 150 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 109 states have internal predecessors, (153), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:57:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:37,985 INFO L93 Difference]: Finished difference Result 557 states and 823 transitions. [2021-11-23 01:57:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:57:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-11-23 01:57:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:38,034 INFO L225 Difference]: With dead ends: 557 [2021-11-23 01:57:38,035 INFO L226 Difference]: Without dead ends: 402 [2021-11-23 01:57:38,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:38,055 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 537 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:38,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 558 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 01:57:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-23 01:57:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2021-11-23 01:57:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 277 states have (on average 1.3754512635379061) internal successors, (381), 284 states have internal predecessors, (381), 75 states have call successors, (75), 38 states have call predecessors, (75), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2021-11-23 01:57:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 551 transitions. [2021-11-23 01:57:38,221 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 551 transitions. Word has length 37 [2021-11-23 01:57:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 551 transitions. [2021-11-23 01:57:38,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:57:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 551 transitions. [2021-11-23 01:57:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 01:57:38,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:38,228 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] [2021-11-23 01:57:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:57:38,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:38,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1888016936, now seen corresponding path program 1 times [2021-11-23 01:57:38,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:38,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581463077] [2021-11-23 01:57:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:38,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:38,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:38,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581463077] [2021-11-23 01:57:38,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581463077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:38,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:38,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:38,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434120042] [2021-11-23 01:57:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:38,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:57:38,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:38,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:57:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:38,359 INFO L87 Difference]: Start difference. First operand 391 states and 551 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 01:57:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:38,632 INFO L93 Difference]: Finished difference Result 515 states and 713 transitions. [2021-11-23 01:57:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-11-23 01:57:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:38,643 INFO L225 Difference]: With dead ends: 515 [2021-11-23 01:57:38,643 INFO L226 Difference]: Without dead ends: 451 [2021-11-23 01:57:38,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:38,651 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 253 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:38,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 362 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-23 01:57:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 444. [2021-11-23 01:57:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 315 states have (on average 1.3587301587301588) internal successors, (428), 322 states have internal predecessors, (428), 83 states have call successors, (83), 45 states have call predecessors, (83), 44 states have return successors, (103), 78 states have call predecessors, (103), 81 states have call successors, (103) [2021-11-23 01:57:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 614 transitions. [2021-11-23 01:57:38,769 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 614 transitions. Word has length 45 [2021-11-23 01:57:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:38,770 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 614 transitions. [2021-11-23 01:57:38,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 01:57:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 614 transitions. [2021-11-23 01:57:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 01:57:38,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:38,783 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] [2021-11-23 01:57:38,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:57:38,785 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1487975737, now seen corresponding path program 1 times [2021-11-23 01:57:38,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:38,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883094138] [2021-11-23 01:57:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:38,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:38,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883094138] [2021-11-23 01:57:38,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883094138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:38,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:38,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:57:38,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770592677] [2021-11-23 01:57:38,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:38,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:57:38,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:57:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:57:38,941 INFO L87 Difference]: Start difference. First operand 444 states and 614 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 01:57:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:39,532 INFO L93 Difference]: Finished difference Result 846 states and 1117 transitions. [2021-11-23 01:57:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:57:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-11-23 01:57:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:39,542 INFO L225 Difference]: With dead ends: 846 [2021-11-23 01:57:39,543 INFO L226 Difference]: Without dead ends: 714 [2021-11-23 01:57:39,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:57:39,555 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 588 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:39,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 738 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:57:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-23 01:57:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 630. [2021-11-23 01:57:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 447 states have (on average 1.3154362416107384) internal successors, (588), 455 states have internal predecessors, (588), 110 states have call successors, (110), 68 states have call predecessors, (110), 71 states have return successors, (134), 108 states have call predecessors, (134), 108 states have call successors, (134) [2021-11-23 01:57:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 832 transitions. [2021-11-23 01:57:39,644 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 832 transitions. Word has length 45 [2021-11-23 01:57:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:39,645 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 832 transitions. [2021-11-23 01:57:39,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 01:57:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 832 transitions. [2021-11-23 01:57:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 01:57:39,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:39,648 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] [2021-11-23 01:57:39,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:57:39,649 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1899068679, now seen corresponding path program 1 times [2021-11-23 01:57:39,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:39,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663227938] [2021-11-23 01:57:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:39,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:39,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:39,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663227938] [2021-11-23 01:57:39,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663227938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:39,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:39,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 01:57:39,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478786119] [2021-11-23 01:57:39,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:39,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:57:39,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:57:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:57:39,831 INFO L87 Difference]: Start difference. First operand 630 states and 832 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 01:57:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:40,449 INFO L93 Difference]: Finished difference Result 1146 states and 1448 transitions. [2021-11-23 01:57:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 01:57:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-11-23 01:57:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:40,458 INFO L225 Difference]: With dead ends: 1146 [2021-11-23 01:57:40,459 INFO L226 Difference]: Without dead ends: 844 [2021-11-23 01:57:40,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 01:57:40,462 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 301 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:40,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 645 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:57:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-23 01:57:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 809. [2021-11-23 01:57:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 572 states have (on average 1.2937062937062938) internal successors, (740), 581 states have internal predecessors, (740), 137 states have call successors, (137), 91 states have call predecessors, (137), 98 states have return successors, (165), 138 states have call predecessors, (165), 135 states have call successors, (165) [2021-11-23 01:57:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1042 transitions. [2021-11-23 01:57:40,554 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1042 transitions. Word has length 46 [2021-11-23 01:57:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:40,555 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 1042 transitions. [2021-11-23 01:57:40,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 01:57:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1042 transitions. [2021-11-23 01:57:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 01:57:40,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:40,558 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] [2021-11-23 01:57:40,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:57:40,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash -575147253, now seen corresponding path program 1 times [2021-11-23 01:57:40,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:40,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833100551] [2021-11-23 01:57:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:40,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:40,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:40,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833100551] [2021-11-23 01:57:40,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833100551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:40,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:40,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:40,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065494888] [2021-11-23 01:57:40,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:40,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:40,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:40,629 INFO L87 Difference]: Start difference. First operand 809 states and 1042 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:57:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:40,782 INFO L93 Difference]: Finished difference Result 1373 states and 1712 transitions. [2021-11-23 01:57:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:40,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-11-23 01:57:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:40,792 INFO L225 Difference]: With dead ends: 1373 [2021-11-23 01:57:40,793 INFO L226 Difference]: Without dead ends: 941 [2021-11-23 01:57:40,795 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 [2021-11-23 01:57:40,796 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 67 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:40,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 320 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-11-23 01:57:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 836. [2021-11-23 01:57:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 595 states have (on average 1.2857142857142858) internal successors, (765), 604 states have internal predecessors, (765), 139 states have call successors, (139), 93 states have call predecessors, (139), 100 states have return successors, (167), 140 states have call predecessors, (167), 137 states have call successors, (167) [2021-11-23 01:57:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1071 transitions. [2021-11-23 01:57:40,903 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1071 transitions. Word has length 47 [2021-11-23 01:57:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:40,904 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1071 transitions. [2021-11-23 01:57:40,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:57:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1071 transitions. [2021-11-23 01:57:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 01:57:40,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:40,908 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:40,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:57:40,909 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1970670378, now seen corresponding path program 1 times [2021-11-23 01:57:40,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:40,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665731791] [2021-11-23 01:57:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:40,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:57:41,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665731791] [2021-11-23 01:57:41,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665731791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:41,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:41,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:41,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549673555] [2021-11-23 01:57:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:41,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:41,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:41,013 INFO L87 Difference]: Start difference. First operand 836 states and 1071 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:57:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:41,120 INFO L93 Difference]: Finished difference Result 1026 states and 1292 transitions. [2021-11-23 01:57:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-11-23 01:57:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:41,127 INFO L225 Difference]: With dead ends: 1026 [2021-11-23 01:57:41,127 INFO L226 Difference]: Without dead ends: 753 [2021-11-23 01:57:41,129 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 [2021-11-23 01:57:41,130 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 166 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:41,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 238 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:57:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-23 01:57:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 644. [2021-11-23 01:57:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 455 states have (on average 1.2813186813186814) internal successors, (583), 462 states have internal predecessors, (583), 115 states have call successors, (115), 73 states have call predecessors, (115), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2021-11-23 01:57:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 833 transitions. [2021-11-23 01:57:41,190 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 833 transitions. Word has length 53 [2021-11-23 01:57:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:41,191 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 833 transitions. [2021-11-23 01:57:41,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:57:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 833 transitions. [2021-11-23 01:57:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 01:57:41,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:41,193 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:41,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:57:41,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:41,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1104131365, now seen corresponding path program 1 times [2021-11-23 01:57:41,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:41,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225900485] [2021-11-23 01:57:41,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:41,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:41,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225900485] [2021-11-23 01:57:41,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225900485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:41,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:41,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:41,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496628685] [2021-11-23 01:57:41,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:41,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:57:41,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:57:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:41,246 INFO L87 Difference]: Start difference. First operand 644 states and 833 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 01:57:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:41,473 INFO L93 Difference]: Finished difference Result 747 states and 949 transitions. [2021-11-23 01:57:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-11-23 01:57:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:41,482 INFO L225 Difference]: With dead ends: 747 [2021-11-23 01:57:41,482 INFO L226 Difference]: Without dead ends: 744 [2021-11-23 01:57:41,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:41,486 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 309 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:41,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 214 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-11-23 01:57:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 643. [2021-11-23 01:57:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 455 states have (on average 1.2747252747252746) internal successors, (580), 461 states have internal predecessors, (580), 114 states have call successors, (114), 73 states have call predecessors, (114), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2021-11-23 01:57:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 829 transitions. [2021-11-23 01:57:41,556 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 829 transitions. Word has length 54 [2021-11-23 01:57:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:41,557 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 829 transitions. [2021-11-23 01:57:41,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 01:57:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 829 transitions. [2021-11-23 01:57:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 01:57:41,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:41,561 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:41,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:57:41,562 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash -132366092, now seen corresponding path program 1 times [2021-11-23 01:57:41,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:41,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785378529] [2021-11-23 01:57:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:41,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:41,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:41,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785378529] [2021-11-23 01:57:41,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785378529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:41,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377136524] [2021-11-23 01:57:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:41,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:41,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:41,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:41,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:57:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 01:57:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:42,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:42,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377136524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:42,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033538789] [2021-11-23 01:57:42,807 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 01:57:42,807 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:42,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:42,819 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:42,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:45,401 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 105 for LOIs [2021-11-23 01:57:45,448 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 73 for LOIs [2021-11-23 01:57:45,460 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 101 for LOIs [2021-11-23 01:57:45,483 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 109 for LOIs [2021-11-23 01:57:45,852 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 105 for LOIs [2021-11-23 01:57:45,922 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 105 for LOIs [2021-11-23 01:57:45,978 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 105 for LOIs [2021-11-23 01:57:46,000 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 112 for LOIs [2021-11-23 01:57:46,023 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:54,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16230#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 01:57:54,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:57:54,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:57:54,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2021-11-23 01:57:54,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429134041] [2021-11-23 01:57:54,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:57:54,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:54,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:54,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:54,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 01:57:54,633 INFO L87 Difference]: Start difference. First operand 643 states and 829 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 01:57:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:55,142 INFO L93 Difference]: Finished difference Result 1216 states and 1484 transitions. [2021-11-23 01:57:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:57:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2021-11-23 01:57:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:55,152 INFO L225 Difference]: With dead ends: 1216 [2021-11-23 01:57:55,153 INFO L226 Difference]: Without dead ends: 1213 [2021-11-23 01:57:55,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 01:57:55,156 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 557 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:55,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 642 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:57:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-23 01:57:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 938. [2021-11-23 01:57:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 660 states have (on average 1.246969696969697) internal successors, (823), 666 states have internal predecessors, (823), 162 states have call successors, (162), 115 states have call predecessors, (162), 114 states have return successors, (183), 158 states have call predecessors, (183), 161 states have call successors, (183) [2021-11-23 01:57:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1168 transitions. [2021-11-23 01:57:55,258 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1168 transitions. Word has length 55 [2021-11-23 01:57:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:55,258 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1168 transitions. [2021-11-23 01:57:55,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 01:57:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1168 transitions. [2021-11-23 01:57:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 01:57:55,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:55,262 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:55,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 01:57:55,484 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1431704731, now seen corresponding path program 2 times [2021-11-23 01:57:55,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:55,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418573545] [2021-11-23 01:57:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:55,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:55,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:55,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418573545] [2021-11-23 01:57:55,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418573545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:55,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:55,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:55,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031464582] [2021-11-23 01:57:55,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:55,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:55,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:55,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:55,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:55,546 INFO L87 Difference]: Start difference. First operand 938 states and 1168 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 01:57:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:55,685 INFO L93 Difference]: Finished difference Result 1351 states and 1641 transitions. [2021-11-23 01:57:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2021-11-23 01:57:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:55,692 INFO L225 Difference]: With dead ends: 1351 [2021-11-23 01:57:55,692 INFO L226 Difference]: Without dead ends: 940 [2021-11-23 01:57:55,694 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 [2021-11-23 01:57:55,696 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 169 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:55,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 271 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-11-23 01:57:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 934. [2021-11-23 01:57:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 656 states have (on average 1.236280487804878) internal successors, (811), 662 states have internal predecessors, (811), 162 states have call successors, (162), 115 states have call predecessors, (162), 114 states have return successors, (183), 158 states have call predecessors, (183), 161 states have call successors, (183) [2021-11-23 01:57:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1156 transitions. [2021-11-23 01:57:55,783 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1156 transitions. Word has length 58 [2021-11-23 01:57:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:55,784 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1156 transitions. [2021-11-23 01:57:55,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 01:57:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1156 transitions. [2021-11-23 01:57:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 01:57:55,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:55,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:55,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:57:55,786 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:55,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:55,787 INFO L85 PathProgramCache]: Analyzing trace with hash -921541998, now seen corresponding path program 1 times [2021-11-23 01:57:55,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:55,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043077645] [2021-11-23 01:57:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:55,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:57:55,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043077645] [2021-11-23 01:57:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043077645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:55,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:55,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:55,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340375732] [2021-11-23 01:57:55,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:55,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:55,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:55,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:55,875 INFO L87 Difference]: Start difference. First operand 934 states and 1156 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:57:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:56,033 INFO L93 Difference]: Finished difference Result 1553 states and 1866 transitions. [2021-11-23 01:57:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:56,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-23 01:57:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:56,045 INFO L225 Difference]: With dead ends: 1553 [2021-11-23 01:57:56,045 INFO L226 Difference]: Without dead ends: 1190 [2021-11-23 01:57:56,047 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 [2021-11-23 01:57:56,048 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 42 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:56,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 356 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-23 01:57:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1009. [2021-11-23 01:57:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 717 states have (on average 1.2357043235704324) internal successors, (886), 723 states have internal predecessors, (886), 169 states have call successors, (169), 122 states have call predecessors, (169), 121 states have return successors, (190), 165 states have call predecessors, (190), 168 states have call successors, (190) [2021-11-23 01:57:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1245 transitions. [2021-11-23 01:57:56,159 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1245 transitions. Word has length 61 [2021-11-23 01:57:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:56,161 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1245 transitions. [2021-11-23 01:57:56,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:57:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1245 transitions. [2021-11-23 01:57:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 01:57:56,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:56,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:56,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 01:57:56,166 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:56,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1333162197, now seen corresponding path program 1 times [2021-11-23 01:57:56,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:56,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299492264] [2021-11-23 01:57:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:56,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 01:57:56,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:56,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299492264] [2021-11-23 01:57:56,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299492264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:56,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:56,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:57:56,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53172791] [2021-11-23 01:57:56,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:56,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:57:56,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:57:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:57:56,252 INFO L87 Difference]: Start difference. First operand 1009 states and 1245 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 01:57:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:56,717 INFO L93 Difference]: Finished difference Result 1641 states and 2183 transitions. [2021-11-23 01:57:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 01:57:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2021-11-23 01:57:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:56,728 INFO L225 Difference]: With dead ends: 1641 [2021-11-23 01:57:56,729 INFO L226 Difference]: Without dead ends: 1325 [2021-11-23 01:57:56,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-23 01:57:56,732 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 298 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:56,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 466 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:57:56,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-11-23 01:57:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1293. [2021-11-23 01:57:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 919 states have (on average 1.2557127312295975) internal successors, (1154), 928 states have internal predecessors, (1154), 221 states have call successors, (221), 152 states have call predecessors, (221), 151 states have return successors, (260), 214 states have call predecessors, (260), 220 states have call successors, (260) [2021-11-23 01:57:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1635 transitions. [2021-11-23 01:57:56,893 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1635 transitions. Word has length 66 [2021-11-23 01:57:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:56,894 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 1635 transitions. [2021-11-23 01:57:56,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 01:57:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1635 transitions. [2021-11-23 01:57:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 01:57:56,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:56,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:56,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 01:57:56,898 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1507808166, now seen corresponding path program 1 times [2021-11-23 01:57:56,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:56,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579815698] [2021-11-23 01:57:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:56,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 01:57:56,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579815698] [2021-11-23 01:57:56,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579815698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:56,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:56,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:56,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710701397] [2021-11-23 01:57:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:56,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:56,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:56,969 INFO L87 Difference]: Start difference. First operand 1293 states and 1635 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:57:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:57,179 INFO L93 Difference]: Finished difference Result 1912 states and 2534 transitions. [2021-11-23 01:57:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2021-11-23 01:57:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:57,191 INFO L225 Difference]: With dead ends: 1912 [2021-11-23 01:57:57,191 INFO L226 Difference]: Without dead ends: 1430 [2021-11-23 01:57:57,194 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 [2021-11-23 01:57:57,196 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 37 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:57,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 361 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-11-23 01:57:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1351. [2021-11-23 01:57:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 969 states have (on average 1.2714138286893706) internal successors, (1232), 978 states have internal predecessors, (1232), 225 states have call successors, (225), 156 states have call predecessors, (225), 155 states have return successors, (264), 218 states have call predecessors, (264), 224 states have call successors, (264) [2021-11-23 01:57:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1721 transitions. [2021-11-23 01:57:57,339 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1721 transitions. Word has length 67 [2021-11-23 01:57:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:57,339 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 1721 transitions. [2021-11-23 01:57:57,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:57:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1721 transitions. [2021-11-23 01:57:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 01:57:57,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:57,343 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:57,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 01:57:57,344 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -923777638, now seen corresponding path program 1 times [2021-11-23 01:57:57,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:57,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887960465] [2021-11-23 01:57:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:57,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:57:57,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:57,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887960465] [2021-11-23 01:57:57,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887960465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:57,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:57,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 01:57:57,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372405473] [2021-11-23 01:57:57,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:57,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:57:57,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:57:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:57:57,435 INFO L87 Difference]: Start difference. First operand 1351 states and 1721 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 01:57:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:58,118 INFO L93 Difference]: Finished difference Result 2400 states and 2904 transitions. [2021-11-23 01:57:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 01:57:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2021-11-23 01:57:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:58,133 INFO L225 Difference]: With dead ends: 2400 [2021-11-23 01:57:58,134 INFO L226 Difference]: Without dead ends: 1719 [2021-11-23 01:57:58,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 01:57:58,138 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 283 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:58,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 622 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:57:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-23 01:57:58,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1670. [2021-11-23 01:57:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1183 states have (on average 1.2409129332206255) internal successors, (1468), 1192 states have internal predecessors, (1468), 281 states have call successors, (281), 205 states have call predecessors, (281), 204 states have return successors, (320), 274 states have call predecessors, (320), 280 states have call successors, (320) [2021-11-23 01:57:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2069 transitions. [2021-11-23 01:57:58,313 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2069 transitions. Word has length 70 [2021-11-23 01:57:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:58,313 INFO L470 AbstractCegarLoop]: Abstraction has 1670 states and 2069 transitions. [2021-11-23 01:57:58,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 01:57:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2069 transitions. [2021-11-23 01:57:58,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 01:57:58,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:58,317 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:58,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 01:57:58,317 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash -412529439, now seen corresponding path program 1 times [2021-11-23 01:57:58,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:58,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197416610] [2021-11-23 01:57:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:58,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:57:58,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197416610] [2021-11-23 01:57:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197416610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:58,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:58,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:58,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931385983] [2021-11-23 01:57:58,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:58,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:58,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:58,385 INFO L87 Difference]: Start difference. First operand 1670 states and 2069 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:57:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:58,575 INFO L93 Difference]: Finished difference Result 2636 states and 3163 transitions. [2021-11-23 01:57:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-23 01:57:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:58,588 INFO L225 Difference]: With dead ends: 2636 [2021-11-23 01:57:58,588 INFO L226 Difference]: Without dead ends: 1846 [2021-11-23 01:57:58,591 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 [2021-11-23 01:57:58,592 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 37 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:58,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 350 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:57:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-11-23 01:57:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1717. [2021-11-23 01:57:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1222 states have (on average 1.2389525368248773) internal successors, (1514), 1231 states have internal predecessors, (1514), 285 states have call successors, (285), 209 states have call predecessors, (285), 208 states have return successors, (324), 278 states have call predecessors, (324), 284 states have call successors, (324) [2021-11-23 01:57:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2123 transitions. [2021-11-23 01:57:58,800 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2123 transitions. Word has length 71 [2021-11-23 01:57:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:58,801 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2123 transitions. [2021-11-23 01:57:58,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:57:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2123 transitions. [2021-11-23 01:57:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 01:57:58,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:58,806 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:58,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 01:57:58,806 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:58,807 INFO L85 PathProgramCache]: Analyzing trace with hash -819604455, now seen corresponding path program 1 times [2021-11-23 01:57:58,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:58,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167639360] [2021-11-23 01:57:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:58,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 01:57:58,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167639360] [2021-11-23 01:57:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167639360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:58,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:58,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:58,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616837097] [2021-11-23 01:57:58,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:58,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:58,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:58,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:58,887 INFO L87 Difference]: Start difference. First operand 1717 states and 2123 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 01:57:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:59,119 INFO L93 Difference]: Finished difference Result 2703 states and 3543 transitions. [2021-11-23 01:57:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-23 01:57:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:59,134 INFO L225 Difference]: With dead ends: 2703 [2021-11-23 01:57:59,134 INFO L226 Difference]: Without dead ends: 2044 [2021-11-23 01:57:59,140 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 [2021-11-23 01:57:59,141 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 160 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:59,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 265 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-11-23 01:57:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2035. [2021-11-23 01:57:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1454 states have (on average 1.251031636863824) internal successors, (1819), 1466 states have internal predecessors, (1819), 339 states have call successors, (339), 241 states have call predecessors, (339), 240 states have return successors, (396), 329 states have call predecessors, (396), 338 states have call successors, (396) [2021-11-23 01:57:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 2554 transitions. [2021-11-23 01:57:59,403 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 2554 transitions. Word has length 86 [2021-11-23 01:57:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:59,403 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 2554 transitions. [2021-11-23 01:57:59,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 01:57:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 2554 transitions. [2021-11-23 01:57:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 01:57:59,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:59,411 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:59,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 01:57:59,411 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1348630585, now seen corresponding path program 1 times [2021-11-23 01:57:59,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:59,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456301904] [2021-11-23 01:57:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:59,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 01:57:59,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:59,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456301904] [2021-11-23 01:57:59,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456301904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:59,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990212296] [2021-11-23 01:57:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:59,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:59,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:59,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:57:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:57:59,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:57:59,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:57:59,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990212296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:59,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:57:59,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2021-11-23 01:57:59,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565187368] [2021-11-23 01:57:59,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:59,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:57:59,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:59,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:57:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-23 01:57:59,961 INFO L87 Difference]: Start difference. First operand 2035 states and 2554 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 01:58:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:00,311 INFO L93 Difference]: Finished difference Result 2899 states and 3559 transitions. [2021-11-23 01:58:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:58:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2021-11-23 01:58:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:00,325 INFO L225 Difference]: With dead ends: 2899 [2021-11-23 01:58:00,325 INFO L226 Difference]: Without dead ends: 1852 [2021-11-23 01:58:00,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-23 01:58:00,330 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 163 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:00,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 765 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:58:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-11-23 01:58:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1667. [2021-11-23 01:58:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1217 states have (on average 1.2728019720624486) internal successors, (1549), 1229 states have internal predecessors, (1549), 268 states have call successors, (268), 181 states have call predecessors, (268), 180 states have return successors, (325), 258 states have call predecessors, (325), 267 states have call successors, (325) [2021-11-23 01:58:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2142 transitions. [2021-11-23 01:58:00,549 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2142 transitions. Word has length 102 [2021-11-23 01:58:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:00,550 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2142 transitions. [2021-11-23 01:58:00,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 01:58:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2142 transitions. [2021-11-23 01:58:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 01:58:00,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:00,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:00,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:00,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 01:58:00,783 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1575000988, now seen corresponding path program 1 times [2021-11-23 01:58:00,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:00,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809167183] [2021-11-23 01:58:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:00,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 01:58:00,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:00,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809167183] [2021-11-23 01:58:00,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809167183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133605886] [2021-11-23 01:58:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:00,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:00,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:00,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:00,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:58:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:58:00,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:58:01,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:01,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133605886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:01,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:01,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 01:58:01,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145324387] [2021-11-23 01:58:01,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:01,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:01,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:01,162 INFO L87 Difference]: Start difference. First operand 1667 states and 2142 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 01:58:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:01,365 INFO L93 Difference]: Finished difference Result 2550 states and 3401 transitions. [2021-11-23 01:58:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 98 [2021-11-23 01:58:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:01,380 INFO L225 Difference]: With dead ends: 2550 [2021-11-23 01:58:01,380 INFO L226 Difference]: Without dead ends: 1892 [2021-11-23 01:58:01,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:01,384 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 51 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:01,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 369 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-11-23 01:58:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1757. [2021-11-23 01:58:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1293 states have (on average 1.2892498066511988) internal successors, (1667), 1305 states have internal predecessors, (1667), 275 states have call successors, (275), 188 states have call predecessors, (275), 187 states have return successors, (332), 265 states have call predecessors, (332), 274 states have call successors, (332) [2021-11-23 01:58:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2274 transitions. [2021-11-23 01:58:01,596 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2274 transitions. Word has length 98 [2021-11-23 01:58:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:01,597 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 2274 transitions. [2021-11-23 01:58:01,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 01:58:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2274 transitions. [2021-11-23 01:58:01,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 01:58:01,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:01,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:01,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:01,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 01:58:01,831 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash 888908188, now seen corresponding path program 2 times [2021-11-23 01:58:01,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:01,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643403954] [2021-11-23 01:58:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:01,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 01:58:01,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:01,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643403954] [2021-11-23 01:58:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643403954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:01,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499777409] [2021-11-23 01:58:01,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:58:01,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:01,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:01,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:01,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:58:01,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 01:58:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:58:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:58:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 01:58:02,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:02,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499777409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:02,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:02,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 01:58:02,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620552191] [2021-11-23 01:58:02,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:02,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:02,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:58:02,196 INFO L87 Difference]: Start difference. First operand 1757 states and 2274 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:02,413 INFO L93 Difference]: Finished difference Result 2512 states and 3427 transitions. [2021-11-23 01:58:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:02,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2021-11-23 01:58:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:02,426 INFO L225 Difference]: With dead ends: 2512 [2021-11-23 01:58:02,426 INFO L226 Difference]: Without dead ends: 1764 [2021-11-23 01:58:02,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:58:02,431 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 82 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:02,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 362 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-11-23 01:58:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1753. [2021-11-23 01:58:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1289 states have (on average 1.2715283165244375) internal successors, (1639), 1301 states have internal predecessors, (1639), 275 states have call successors, (275), 188 states have call predecessors, (275), 187 states have return successors, (332), 265 states have call predecessors, (332), 274 states have call successors, (332) [2021-11-23 01:58:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2246 transitions. [2021-11-23 01:58:02,656 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2246 transitions. Word has length 98 [2021-11-23 01:58:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:02,656 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2246 transitions. [2021-11-23 01:58:02,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2246 transitions. [2021-11-23 01:58:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 01:58:02,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:02,663 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:02,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:02,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 01:58:02,878 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:02,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1911878498, now seen corresponding path program 1 times [2021-11-23 01:58:02,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:02,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233613775] [2021-11-23 01:58:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:02,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 01:58:02,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233613775] [2021-11-23 01:58:02,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233613775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75111487] [2021-11-23 01:58:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:02,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:02,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:02,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:02,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:58:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:03,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:58:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 01:58:03,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:03,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75111487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:03,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:03,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 01:58:03,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590349583] [2021-11-23 01:58:03,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:03,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:03,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:58:03,281 INFO L87 Difference]: Start difference. First operand 1753 states and 2246 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:03,528 INFO L93 Difference]: Finished difference Result 3306 states and 4398 transitions. [2021-11-23 01:58:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2021-11-23 01:58:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:03,545 INFO L225 Difference]: With dead ends: 3306 [2021-11-23 01:58:03,545 INFO L226 Difference]: Without dead ends: 2244 [2021-11-23 01:58:03,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:58:03,551 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 41 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:03,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 331 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-11-23 01:58:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1913. [2021-11-23 01:58:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1421 states have (on average 1.2864180154820548) internal successors, (1828), 1434 states have internal predecessors, (1828), 289 states have call successors, (289), 202 states have call predecessors, (289), 201 states have return successors, (346), 278 states have call predecessors, (346), 288 states have call successors, (346) [2021-11-23 01:58:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2463 transitions. [2021-11-23 01:58:03,825 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2463 transitions. Word has length 98 [2021-11-23 01:58:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:03,826 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 2463 transitions. [2021-11-23 01:58:03,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2463 transitions. [2021-11-23 01:58:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 01:58:03,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:03,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:03,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:04,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:04,055 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1146711925, now seen corresponding path program 1 times [2021-11-23 01:58:04,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:04,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582118914] [2021-11-23 01:58:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:04,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 01:58:04,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582118914] [2021-11-23 01:58:04,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582118914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377857555] [2021-11-23 01:58:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:04,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:04,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:04,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:58:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 01:58:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 01:58:04,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:04,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377857555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:04,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:04,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-23 01:58:04,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691222582] [2021-11-23 01:58:04,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:04,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:58:04,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:58:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:04,503 INFO L87 Difference]: Start difference. First operand 1913 states and 2463 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 01:58:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:05,043 INFO L93 Difference]: Finished difference Result 3785 states and 5009 transitions. [2021-11-23 01:58:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:58:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 99 [2021-11-23 01:58:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:05,064 INFO L225 Difference]: With dead ends: 3785 [2021-11-23 01:58:05,064 INFO L226 Difference]: Without dead ends: 2563 [2021-11-23 01:58:05,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:58:05,071 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 309 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:05,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 385 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:58:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-11-23 01:58:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2561. [2021-11-23 01:58:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 1892 states have (on average 1.2684989429175475) internal successors, (2400), 1911 states have internal predecessors, (2400), 397 states have call successors, (397), 271 states have call predecessors, (397), 270 states have return successors, (493), 380 states have call predecessors, (493), 396 states have call successors, (493) [2021-11-23 01:58:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3290 transitions. [2021-11-23 01:58:05,386 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3290 transitions. Word has length 99 [2021-11-23 01:58:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:05,386 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 3290 transitions. [2021-11-23 01:58:05,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 01:58:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3290 transitions. [2021-11-23 01:58:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 01:58:05,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:05,395 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:05,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:05,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:05,623 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1210134155, now seen corresponding path program 1 times [2021-11-23 01:58:05,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310474513] [2021-11-23 01:58:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:05,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 01:58:05,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310474513] [2021-11-23 01:58:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310474513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:05,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:58:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457949348] [2021-11-23 01:58:05,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:05,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:58:05,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:58:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:58:05,683 INFO L87 Difference]: Start difference. First operand 2561 states and 3290 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:06,098 INFO L93 Difference]: Finished difference Result 4284 states and 5687 transitions. [2021-11-23 01:58:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:58:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2021-11-23 01:58:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:06,128 INFO L225 Difference]: With dead ends: 4284 [2021-11-23 01:58:06,136 INFO L226 Difference]: Without dead ends: 2902 [2021-11-23 01:58:06,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:58:06,142 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 193 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:06,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 292 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-11-23 01:58:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2846. [2021-11-23 01:58:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2846 states, 2139 states have (on average 1.2538569424964936) internal successors, (2682), 2155 states have internal predecessors, (2682), 403 states have call successors, (403), 301 states have call predecessors, (403), 302 states have return successors, (498), 391 states have call predecessors, (498), 402 states have call successors, (498) [2021-11-23 01:58:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 3583 transitions. [2021-11-23 01:58:06,404 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 3583 transitions. Word has length 102 [2021-11-23 01:58:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:06,404 INFO L470 AbstractCegarLoop]: Abstraction has 2846 states and 3583 transitions. [2021-11-23 01:58:06,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 3583 transitions. [2021-11-23 01:58:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 01:58:06,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:06,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:06,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 01:58:06,415 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1990115084, now seen corresponding path program 2 times [2021-11-23 01:58:06,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:06,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871461440] [2021-11-23 01:58:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:06,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 01:58:06,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:06,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871461440] [2021-11-23 01:58:06,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871461440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:06,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:06,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:58:06,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17383703] [2021-11-23 01:58:06,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:06,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:58:06,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:58:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:58:06,466 INFO L87 Difference]: Start difference. First operand 2846 states and 3583 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 01:58:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:06,889 INFO L93 Difference]: Finished difference Result 4835 states and 6323 transitions. [2021-11-23 01:58:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:58:06,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 102 [2021-11-23 01:58:06,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:06,903 INFO L225 Difference]: With dead ends: 4835 [2021-11-23 01:58:06,903 INFO L226 Difference]: Without dead ends: 3247 [2021-11-23 01:58:06,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:58:06,911 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 247 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:06,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 371 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:58:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-11-23 01:58:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2618. [2021-11-23 01:58:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 1965 states have (on average 1.2183206106870228) internal successors, (2394), 1981 states have internal predecessors, (2394), 372 states have call successors, (372), 280 states have call predecessors, (372), 279 states have return successors, (418), 358 states have call predecessors, (418), 371 states have call successors, (418) [2021-11-23 01:58:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3184 transitions. [2021-11-23 01:58:07,173 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3184 transitions. Word has length 102 [2021-11-23 01:58:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:07,176 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 3184 transitions. [2021-11-23 01:58:07,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 01:58:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3184 transitions. [2021-11-23 01:58:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 01:58:07,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:07,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:07,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 01:58:07,185 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1457570784, now seen corresponding path program 1 times [2021-11-23 01:58:07,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:07,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311218762] [2021-11-23 01:58:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:07,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 01:58:07,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:07,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311218762] [2021-11-23 01:58:07,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311218762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:07,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097165089] [2021-11-23 01:58:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:07,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:07,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:07,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:07,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 01:58:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 01:58:07,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 01:58:07,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:07,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097165089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:07,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:07,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-23 01:58:07,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174674472] [2021-11-23 01:58:07,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:07,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:58:07,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:07,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:58:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:58:07,547 INFO L87 Difference]: Start difference. First operand 2618 states and 3184 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 01:58:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:07,888 INFO L93 Difference]: Finished difference Result 3781 states and 4631 transitions. [2021-11-23 01:58:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:58:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 103 [2021-11-23 01:58:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:07,899 INFO L225 Difference]: With dead ends: 3781 [2021-11-23 01:58:07,899 INFO L226 Difference]: Without dead ends: 2687 [2021-11-23 01:58:07,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:58:07,905 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 171 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:07,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 511 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-11-23 01:58:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2529. [2021-11-23 01:58:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 1889 states have (on average 1.216516675489677) internal successors, (2298), 1902 states have internal predecessors, (2298), 367 states have call successors, (367), 272 states have call predecessors, (367), 271 states have return successors, (407), 356 states have call predecessors, (407), 366 states have call successors, (407) [2021-11-23 01:58:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 3072 transitions. [2021-11-23 01:58:08,188 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 3072 transitions. Word has length 103 [2021-11-23 01:58:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:08,189 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 3072 transitions. [2021-11-23 01:58:08,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 01:58:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 3072 transitions. [2021-11-23 01:58:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 01:58:08,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:08,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:08,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:08,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 01:58:08,411 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -148940730, now seen corresponding path program 1 times [2021-11-23 01:58:08,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414098058] [2021-11-23 01:58:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:08,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 01:58:08,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:08,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414098058] [2021-11-23 01:58:08,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414098058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:08,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249314738] [2021-11-23 01:58:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:08,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:08,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:08,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:08,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:58:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:58:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:58:08,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:08,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249314738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:08,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:08,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2021-11-23 01:58:08,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193151427] [2021-11-23 01:58:08,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:08,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:08,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:08,823 INFO L87 Difference]: Start difference. First operand 2529 states and 3072 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:09,145 INFO L93 Difference]: Finished difference Result 4089 states and 5078 transitions. [2021-11-23 01:58:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:09,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 104 [2021-11-23 01:58:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:09,156 INFO L225 Difference]: With dead ends: 4089 [2021-11-23 01:58:09,156 INFO L226 Difference]: Without dead ends: 2834 [2021-11-23 01:58:09,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:09,162 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 151 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:09,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 204 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-11-23 01:58:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2798. [2021-11-23 01:58:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2132 states have (on average 1.1955909943714822) internal successors, (2549), 2145 states have internal predecessors, (2549), 369 states have call successors, (369), 296 states have call predecessors, (369), 295 states have return successors, (439), 358 states have call predecessors, (439), 368 states have call successors, (439) [2021-11-23 01:58:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3357 transitions. [2021-11-23 01:58:09,394 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3357 transitions. Word has length 104 [2021-11-23 01:58:09,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:09,395 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 3357 transitions. [2021-11-23 01:58:09,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3357 transitions. [2021-11-23 01:58:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 01:58:09,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:09,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:09,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:09,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:09,631 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 764258265, now seen corresponding path program 1 times [2021-11-23 01:58:09,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:09,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213527613] [2021-11-23 01:58:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:09,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 01:58:09,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213527613] [2021-11-23 01:58:09,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213527613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421750420] [2021-11-23 01:58:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:09,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:09,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:09,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 01:58:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:58:09,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:58:09,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:09,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421750420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:09,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:09,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 01:58:09,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969858739] [2021-11-23 01:58:09,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:09,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:09,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:09,959 INFO L87 Difference]: Start difference. First operand 2798 states and 3357 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 01:58:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:10,266 INFO L93 Difference]: Finished difference Result 4302 states and 5249 transitions. [2021-11-23 01:58:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2021-11-23 01:58:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:10,278 INFO L225 Difference]: With dead ends: 4302 [2021-11-23 01:58:10,278 INFO L226 Difference]: Without dead ends: 3176 [2021-11-23 01:58:10,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:10,283 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 42 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:10,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 363 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-11-23 01:58:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2966. [2021-11-23 01:58:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2268 states have (on average 1.2032627865961198) internal successors, (2729), 2281 states have internal predecessors, (2729), 385 states have call successors, (385), 312 states have call predecessors, (385), 311 states have return successors, (455), 374 states have call predecessors, (455), 384 states have call successors, (455) [2021-11-23 01:58:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 3569 transitions. [2021-11-23 01:58:10,511 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 3569 transitions. Word has length 101 [2021-11-23 01:58:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:10,511 INFO L470 AbstractCegarLoop]: Abstraction has 2966 states and 3569 transitions. [2021-11-23 01:58:10,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 01:58:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 3569 transitions. [2021-11-23 01:58:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 01:58:10,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:10,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:10,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:10,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 01:58:10,735 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:10,735 INFO L85 PathProgramCache]: Analyzing trace with hash 821191965, now seen corresponding path program 1 times [2021-11-23 01:58:10,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667723802] [2021-11-23 01:58:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:10,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 01:58:10,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667723802] [2021-11-23 01:58:10,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667723802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006172409] [2021-11-23 01:58:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:10,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:10,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:10,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 01:58:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:10,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:58:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 01:58:11,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:11,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006172409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:11,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:11,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-23 01:58:11,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349149650] [2021-11-23 01:58:11,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:11,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:58:11,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:58:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:58:11,185 INFO L87 Difference]: Start difference. First operand 2966 states and 3569 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 01:58:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:11,662 INFO L93 Difference]: Finished difference Result 5666 states and 6888 transitions. [2021-11-23 01:58:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:58:11,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2021-11-23 01:58:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:11,677 INFO L225 Difference]: With dead ends: 5666 [2021-11-23 01:58:11,678 INFO L226 Difference]: Without dead ends: 3734 [2021-11-23 01:58:11,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:58:11,684 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 272 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:11,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 298 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2021-11-23 01:58:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3300. [2021-11-23 01:58:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 2563 states have (on average 1.187670698400312) internal successors, (3044), 2581 states have internal predecessors, (3044), 394 states have call successors, (394), 335 states have call predecessors, (394), 341 states have return successors, (471), 385 states have call predecessors, (471), 393 states have call successors, (471) [2021-11-23 01:58:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 3909 transitions. [2021-11-23 01:58:11,946 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 3909 transitions. Word has length 102 [2021-11-23 01:58:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:11,947 INFO L470 AbstractCegarLoop]: Abstraction has 3300 states and 3909 transitions. [2021-11-23 01:58:11,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 01:58:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 3909 transitions. [2021-11-23 01:58:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 01:58:11,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:11,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:12,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:12,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 01:58:12,187 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:12,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash -868612127, now seen corresponding path program 1 times [2021-11-23 01:58:12,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:12,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803923908] [2021-11-23 01:58:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:12,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 01:58:12,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:12,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803923908] [2021-11-23 01:58:12,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803923908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:12,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:12,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:58:12,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450122277] [2021-11-23 01:58:12,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:12,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:58:12,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:58:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:58:12,273 INFO L87 Difference]: Start difference. First operand 3300 states and 3909 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:12,891 INFO L93 Difference]: Finished difference Result 7231 states and 8642 transitions. [2021-11-23 01:58:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:58:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-11-23 01:58:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:12,905 INFO L225 Difference]: With dead ends: 7231 [2021-11-23 01:58:12,905 INFO L226 Difference]: Without dead ends: 4100 [2021-11-23 01:58:12,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:58:12,914 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 102 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:12,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 422 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:58:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-11-23 01:58:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3999. [2021-11-23 01:58:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3084 states have (on average 1.177367055771725) internal successors, (3631), 3108 states have internal predecessors, (3631), 494 states have call successors, (494), 417 states have call predecessors, (494), 419 states have return successors, (600), 475 states have call predecessors, (600), 493 states have call successors, (600) [2021-11-23 01:58:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 4725 transitions. [2021-11-23 01:58:13,207 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 4725 transitions. Word has length 103 [2021-11-23 01:58:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:13,208 INFO L470 AbstractCegarLoop]: Abstraction has 3999 states and 4725 transitions. [2021-11-23 01:58:13,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 01:58:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 4725 transitions. [2021-11-23 01:58:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 01:58:13,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:13,221 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:13,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 01:58:13,222 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash -56060095, now seen corresponding path program 1 times [2021-11-23 01:58:13,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:13,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350113977] [2021-11-23 01:58:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:13,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 01:58:13,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:13,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350113977] [2021-11-23 01:58:13,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350113977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:13,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410635429] [2021-11-23 01:58:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:13,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:13,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:13,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 01:58:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:13,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 01:58:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:13,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:13,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410635429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:13,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:13,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2021-11-23 01:58:13,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532364544] [2021-11-23 01:58:13,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:13,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:58:13,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:58:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:58:13,655 INFO L87 Difference]: Start difference. First operand 3999 states and 4725 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 01:58:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:14,489 INFO L93 Difference]: Finished difference Result 7242 states and 8653 transitions. [2021-11-23 01:58:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:58:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 103 [2021-11-23 01:58:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:14,507 INFO L225 Difference]: With dead ends: 7242 [2021-11-23 01:58:14,508 INFO L226 Difference]: Without dead ends: 4957 [2021-11-23 01:58:14,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:58:14,516 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 184 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:14,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 598 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:58:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2021-11-23 01:58:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4747. [2021-11-23 01:58:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 3659 states have (on average 1.1705383984695272) internal successors, (4283), 3685 states have internal predecessors, (4283), 592 states have call successors, (592), 495 states have call predecessors, (592), 494 states have return successors, (749), 568 states have call predecessors, (749), 591 states have call successors, (749) [2021-11-23 01:58:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 5624 transitions. [2021-11-23 01:58:15,075 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 5624 transitions. Word has length 103 [2021-11-23 01:58:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:15,076 INFO L470 AbstractCegarLoop]: Abstraction has 4747 states and 5624 transitions. [2021-11-23 01:58:15,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 01:58:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 5624 transitions. [2021-11-23 01:58:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 01:58:15,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:15,084 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:15,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:15,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 01:58:15,300 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1146756190, now seen corresponding path program 1 times [2021-11-23 01:58:15,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:15,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415879869] [2021-11-23 01:58:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:15,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 01:58:15,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:15,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415879869] [2021-11-23 01:58:15,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415879869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:15,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067859678] [2021-11-23 01:58:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:15,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:15,394 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:15,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 01:58:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 01:58:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 01:58:15,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:58:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 01:58:16,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067859678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:58:16,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912685632] [2021-11-23 01:58:16,240 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2021-11-23 01:58:16,241 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:58:16,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:58:16,242 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:58:16,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:58:25,372 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 186 for LOIs [2021-11-23 01:58:29,706 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2021-11-23 01:58:29,737 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 192 for LOIs [2021-11-23 01:58:29,797 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2021-11-23 01:58:30,038 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 66 for LOIs [2021-11-23 01:58:30,636 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 216 for LOIs [2021-11-23 01:58:34,371 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:58:46,374 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification. DAG size of input: 384 DAG size of output: 302 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 01:59:06,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [912685632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:06,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:59:06,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [8, 8, 6] total 60 [2021-11-23 01:59:06,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365450889] [2021-11-23 01:59:06,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:06,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 01:59:06,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:06,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 01:59:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 01:59:06,225 INFO L87 Difference]: Start difference. First operand 4747 states and 5624 transitions. Second operand has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 01:59:26,610 WARN L227 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 303 DAG size of output: 287 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 01:59:47,823 WARN L227 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 302 DAG size of output: 284 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:00:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:06,211 INFO L93 Difference]: Finished difference Result 8340 states and 9933 transitions. [2021-11-23 02:00:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-23 02:00:06,211 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 109 [2021-11-23 02:00:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:06,227 INFO L225 Difference]: With dead ends: 8340 [2021-11-23 02:00:06,227 INFO L226 Difference]: Without dead ends: 4695 [2021-11-23 02:00:06,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 263 SyntacticMatches, 17 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7965 ImplicationChecksByTransitivity, 86.1s TimeCoverageRelationStatistics Valid=1736, Invalid=19144, Unknown=0, NotChecked=0, Total=20880 [2021-11-23 02:00:06,244 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 389 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 4708 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 4935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 4708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:06,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 1962 Invalid, 4935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 4708 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 02:00:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2021-11-23 02:00:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4648. [2021-11-23 02:00:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 3576 states have (on average 1.166387024608501) internal successors, (4171), 3603 states have internal predecessors, (4171), 581 states have call successors, (581), 490 states have call predecessors, (581), 489 states have return successors, (734), 556 states have call predecessors, (734), 580 states have call successors, (734) [2021-11-23 02:00:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 5486 transitions. [2021-11-23 02:00:06,785 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 5486 transitions. Word has length 109 [2021-11-23 02:00:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:06,786 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 5486 transitions. [2021-11-23 02:00:06,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:00:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 5486 transitions. [2021-11-23 02:00:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:00:06,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:06,794 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:06,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:00:07,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 02:00:07,019 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1365738502, now seen corresponding path program 1 times [2021-11-23 02:00:07,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036693126] [2021-11-23 02:00:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:07,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:00:07,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036693126] [2021-11-23 02:00:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036693126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:00:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998998212] [2021-11-23 02:00:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:07,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:07,098 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:07,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:00:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:07,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:00:07,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:00:07,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:00:07,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998998212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:07,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:00:07,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:00:07,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046364036] [2021-11-23 02:00:07,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:07,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:00:07,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:00:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:00:07,423 INFO L87 Difference]: Start difference. First operand 4648 states and 5486 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:00:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:08,051 INFO L93 Difference]: Finished difference Result 5197 states and 6111 transitions. [2021-11-23 02:00:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:00:08,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2021-11-23 02:00:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:08,068 INFO L225 Difference]: With dead ends: 5197 [2021-11-23 02:00:08,069 INFO L226 Difference]: Without dead ends: 4604 [2021-11-23 02:00:08,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:00:08,073 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 66 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:08,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1106 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:00:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2021-11-23 02:00:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4512. [2021-11-23 02:00:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3476 states have (on average 1.166283084004603) internal successors, (4054), 3503 states have internal predecessors, (4054), 562 states have call successors, (562), 473 states have call predecessors, (562), 472 states have return successors, (715), 537 states have call predecessors, (715), 561 states have call successors, (715) [2021-11-23 02:00:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 5331 transitions. [2021-11-23 02:00:08,618 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 5331 transitions. Word has length 112 [2021-11-23 02:00:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:08,618 INFO L470 AbstractCegarLoop]: Abstraction has 4512 states and 5331 transitions. [2021-11-23 02:00:08,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:00:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 5331 transitions. [2021-11-23 02:00:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:00:08,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:08,628 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:08,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:00:08,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:08,843 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1650442011, now seen corresponding path program 1 times [2021-11-23 02:00:08,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:08,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848455308] [2021-11-23 02:00:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:08,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:00:08,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:08,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848455308] [2021-11-23 02:00:08,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848455308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:00:08,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100074868] [2021-11-23 02:00:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:08,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:08,919 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:08,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:00:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:00:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:00:09,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:00:09,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100074868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:09,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:00:09,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-11-23 02:00:09,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141554310] [2021-11-23 02:00:09,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:09,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:00:09,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:00:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:00:09,260 INFO L87 Difference]: Start difference. First operand 4512 states and 5331 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:00:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:09,744 INFO L93 Difference]: Finished difference Result 5261 states and 6176 transitions. [2021-11-23 02:00:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:00:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2021-11-23 02:00:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:09,762 INFO L225 Difference]: With dead ends: 5261 [2021-11-23 02:00:09,762 INFO L226 Difference]: Without dead ends: 4804 [2021-11-23 02:00:09,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:00:09,767 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 148 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:09,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 832 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:00:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2021-11-23 02:00:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4770. [2021-11-23 02:00:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 3638 states have (on average 1.1638262781748214) internal successors, (4234), 3671 states have internal predecessors, (4234), 610 states have call successors, (610), 515 states have call predecessors, (610), 520 states have return successors, (775), 585 states have call predecessors, (775), 609 states have call successors, (775) [2021-11-23 02:00:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 5619 transitions. [2021-11-23 02:00:10,436 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 5619 transitions. Word has length 113 [2021-11-23 02:00:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:10,437 INFO L470 AbstractCegarLoop]: Abstraction has 4770 states and 5619 transitions. [2021-11-23 02:00:10,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:00:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 5619 transitions. [2021-11-23 02:00:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:00:10,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:10,445 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:10,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:00:10,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:10,659 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1528013402, now seen corresponding path program 1 times [2021-11-23 02:00:10,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:10,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548831525] [2021-11-23 02:00:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:10,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:00:10,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548831525] [2021-11-23 02:00:10,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548831525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:00:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717854907] [2021-11-23 02:00:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:10,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:10,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:10,743 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:10,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:00:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:00:10,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:00:11,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:00:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 02:00:11,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717854907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:00:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362969099] [2021-11-23 02:00:11,438 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-23 02:00:11,438 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:00:11,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:00:11,439 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:00:11,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:00:18,339 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2021-11-23 02:00:28,922 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2021-11-23 02:00:28,954 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 193 for LOIs [2021-11-23 02:00:29,014 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2021-11-23 02:00:29,129 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2021-11-23 02:00:29,768 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 217 for LOIs [2021-11-23 02:00:30,290 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:00:47,685 WARN L227 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 569 DAG size of output: 387 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:00:58,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1362969099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:58,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:00:58,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [8, 8, 6] total 63 [2021-11-23 02:00:58,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647876396] [2021-11-23 02:00:58,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:58,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 02:00:58,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:58,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 02:00:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3506, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 02:00:58,388 INFO L87 Difference]: Start difference. First operand 4770 states and 5619 transitions. Second operand has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:01:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:53,411 INFO L93 Difference]: Finished difference Result 8325 states and 9920 transitions. [2021-11-23 02:01:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-23 02:01:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 111 [2021-11-23 02:01:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:53,438 INFO L225 Difference]: With dead ends: 8325 [2021-11-23 02:01:53,439 INFO L226 Difference]: Without dead ends: 5207 [2021-11-23 02:01:53,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 266 SyntacticMatches, 16 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10348 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=2166, Invalid=24894, Unknown=0, NotChecked=0, Total=27060 [2021-11-23 02:01:53,466 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 558 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 5800 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 6057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 5800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:53,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 2582 Invalid, 6057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 5800 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-23 02:01:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2021-11-23 02:01:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 5113. [2021-11-23 02:01:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 3892 states have (on average 1.157502569373073) internal successors, (4505), 3935 states have internal predecessors, (4505), 655 states have call successors, (655), 552 states have call predecessors, (655), 564 states have return successors, (834), 627 states have call predecessors, (834), 654 states have call successors, (834) [2021-11-23 02:01:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 5994 transitions. [2021-11-23 02:01:54,193 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 5994 transitions. Word has length 111 [2021-11-23 02:01:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:54,194 INFO L470 AbstractCegarLoop]: Abstraction has 5113 states and 5994 transitions. [2021-11-23 02:01:54,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:01:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 5994 transitions. [2021-11-23 02:01:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:01:54,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:54,204 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:54,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:54,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:54,419 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1071958657, now seen corresponding path program 1 times [2021-11-23 02:01:54,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643798825] [2021-11-23 02:01:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:54,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:01:54,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643798825] [2021-11-23 02:01:54,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643798825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:01:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507739201] [2021-11-23 02:01:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:54,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:54,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:54,911 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:54,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:01:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 02:01:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:01:56,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:01:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507739201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998845294] [2021-11-23 02:01:58,251 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-23 02:01:58,251 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:58,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:58,252 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:58,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:16,048 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 184 for LOIs [2021-11-23 02:02:16,388 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 136 for LOIs [2021-11-23 02:02:16,427 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 73 for LOIs [2021-11-23 02:02:16,436 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 196 for LOIs [2021-11-23 02:02:17,257 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 124 for LOIs [2021-11-23 02:02:17,378 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 73 for LOIs [2021-11-23 02:02:17,484 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 188 for LOIs [2021-11-23 02:02:17,801 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 211 for LOIs [2021-11-23 02:02:17,973 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:43,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258465#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~t2_i~0 0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (= ~local~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:02:43,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:43,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:43,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 16] total 55 [2021-11-23 02:02:43,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688866797] [2021-11-23 02:02:43,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:43,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-23 02:02:43,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-23 02:02:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=11593, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 02:02:43,754 INFO L87 Difference]: Start difference. First operand 5113 states and 5994 transitions. Second operand has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-23 02:03:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:03,500 INFO L93 Difference]: Finished difference Result 8053 states and 9556 transitions. [2021-11-23 02:03:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-23 02:03:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) Word has length 114 [2021-11-23 02:03:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:03,526 INFO L225 Difference]: With dead ends: 8053 [2021-11-23 02:03:03,526 INFO L226 Difference]: Without dead ends: 7254 [2021-11-23 02:03:03,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51599 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=11427, Invalid=117813, Unknown=0, NotChecked=0, Total=129240 [2021-11-23 02:03:03,553 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 4490 mSDsluCounter, 3762 mSDsCounter, 0 mSdLazyCounter, 8052 mSolverCounterSat, 3013 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4492 SdHoareTripleChecker+Valid, 3562 SdHoareTripleChecker+Invalid, 11065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3013 IncrementalHoareTripleChecker+Valid, 8052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:03,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4492 Valid, 3562 Invalid, 11065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3013 Valid, 8052 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 02:03:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7254 states. [2021-11-23 02:03:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7254 to 5371. [2021-11-23 02:03:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5371 states, 4066 states have (on average 1.1571569109690114) internal successors, (4705), 4110 states have internal predecessors, (4705), 694 states have call successors, (694), 587 states have call predecessors, (694), 609 states have return successors, (885), 674 states have call predecessors, (885), 693 states have call successors, (885) [2021-11-23 02:03:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5371 states to 5371 states and 6284 transitions. [2021-11-23 02:03:04,475 INFO L78 Accepts]: Start accepts. Automaton has 5371 states and 6284 transitions. Word has length 114 [2021-11-23 02:03:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:04,476 INFO L470 AbstractCegarLoop]: Abstraction has 5371 states and 6284 transitions. [2021-11-23 02:03:04,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-23 02:03:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 5371 states and 6284 transitions. [2021-11-23 02:03:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:03:04,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:04,484 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:04,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:04,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-23 02:03:04,703 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:04,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1282968393, now seen corresponding path program 1 times [2021-11-23 02:03:04,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:04,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233254528] [2021-11-23 02:03:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:04,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:03:04,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:04,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233254528] [2021-11-23 02:03:04,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233254528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:03:04,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516174245] [2021-11-23 02:03:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:04,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:03:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:04,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:03:04,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:03:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:05,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:03:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:03:05,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 02:03:05,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516174245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371057107] [2021-11-23 02:03:05,807 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-23 02:03:05,807 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:03:05,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:03:05,808 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:03:05,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:03:11,896 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2021-11-23 02:03:19,044 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 67 for LOIs [2021-11-23 02:03:19,056 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 193 for LOIs [2021-11-23 02:03:19,124 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2021-11-23 02:03:19,259 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2021-11-23 02:03:19,820 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 217 for LOIs [2021-11-23 02:03:20,897 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:03:37,138 WARN L227 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 399 DAG size of output: 248 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:03:47,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1371057107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:47,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:03:47,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [13, 9, 6] total 69 [2021-11-23 02:03:47,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901249793] [2021-11-23 02:03:47,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:47,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 02:03:47,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 02:03:47,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=4307, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 02:03:47,536 INFO L87 Difference]: Start difference. First operand 5371 states and 6284 transitions. Second operand has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:04:02,266 WARN L227 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 219 DAG size of output: 219 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:04:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:57,027 INFO L93 Difference]: Finished difference Result 9071 states and 10695 transitions. [2021-11-23 02:04:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-23 02:04:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 112 [2021-11-23 02:04:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:57,039 INFO L225 Difference]: With dead ends: 9071 [2021-11-23 02:04:57,040 INFO L226 Difference]: Without dead ends: 4979 [2021-11-23 02:04:57,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 273 SyntacticMatches, 17 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11614 ImplicationChecksByTransitivity, 89.6s TimeCoverageRelationStatistics Valid=2132, Invalid=26938, Unknown=0, NotChecked=0, Total=29070 [2021-11-23 02:04:57,053 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 573 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 5614 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 5866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 5614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:57,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 2475 Invalid, 5866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 5614 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 02:04:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-11-23 02:04:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 4926. [2021-11-23 02:04:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 3722 states have (on average 1.1563675443310049) internal successors, (4304), 3762 states have internal predecessors, (4304), 640 states have call successors, (640), 540 states have call predecessors, (640), 562 states have return successors, (819), 624 states have call predecessors, (819), 639 states have call successors, (819) [2021-11-23 02:04:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 5763 transitions. [2021-11-23 02:04:57,559 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 5763 transitions. Word has length 112 [2021-11-23 02:04:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:57,559 INFO L470 AbstractCegarLoop]: Abstraction has 4926 states and 5763 transitions. [2021-11-23 02:04:57,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:04:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 5763 transitions. [2021-11-23 02:04:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:04:57,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:57,566 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:57,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:57,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 02:04:57,783 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:57,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash 159345056, now seen corresponding path program 1 times [2021-11-23 02:04:57,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:57,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174798186] [2021-11-23 02:04:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:04:57,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174798186] [2021-11-23 02:04:57,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174798186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646301302] [2021-11-23 02:04:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:57,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:57,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:57,924 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:57,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:04:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:04:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:04:58,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:04:58,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646301302] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:58,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:04:58,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2021-11-23 02:04:58,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358273425] [2021-11-23 02:04:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:58,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:04:58,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:04:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:04:58,487 INFO L87 Difference]: Start difference. First operand 4926 states and 5763 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:04:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:59,372 INFO L93 Difference]: Finished difference Result 6254 states and 7316 transitions. [2021-11-23 02:04:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:04:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2021-11-23 02:04:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:59,389 INFO L225 Difference]: With dead ends: 6254 [2021-11-23 02:04:59,389 INFO L226 Difference]: Without dead ends: 5263 [2021-11-23 02:04:59,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:04:59,394 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 274 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:59,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 427 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:04:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2021-11-23 02:05:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5006. [2021-11-23 02:05:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 3767 states have (on average 1.156092381205203) internal successors, (4355), 3810 states have internal predecessors, (4355), 659 states have call successors, (659), 549 states have call predecessors, (659), 578 states have return successors, (859), 647 states have call predecessors, (859), 658 states have call successors, (859) [2021-11-23 02:05:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 5873 transitions. [2021-11-23 02:05:00,032 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 5873 transitions. Word has length 115 [2021-11-23 02:05:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:00,033 INFO L470 AbstractCegarLoop]: Abstraction has 5006 states and 5873 transitions. [2021-11-23 02:05:00,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:05:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 5873 transitions. [2021-11-23 02:05:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:05:00,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:00,038 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:00,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:00,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:00,259 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1739317777, now seen corresponding path program 1 times [2021-11-23 02:05:00,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:00,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781036304] [2021-11-23 02:05:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:00,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:05:00,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781036304] [2021-11-23 02:05:00,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781036304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763087438] [2021-11-23 02:05:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:00,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:00,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:00,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 02:05:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:00,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:05:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:05:01,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:05:01,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763087438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:01,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119304635] [2021-11-23 02:05:01,971 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-23 02:05:01,971 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:01,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:01,972 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:01,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:05:13,777 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 120 for LOIs [2021-11-23 02:05:13,813 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 68 for LOIs [2021-11-23 02:05:13,823 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 139 for LOIs [2021-11-23 02:05:13,849 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 77 for LOIs [2021-11-23 02:05:13,948 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 125 for LOIs [2021-11-23 02:05:14,289 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 118 for LOIs [2021-11-23 02:05:14,324 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:05:32,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '316763#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_eval2_~tmp~5#1| 0)) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2021-11-23 02:05:32,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:05:32,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:05:32,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 39 [2021-11-23 02:05:32,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214962063] [2021-11-23 02:05:32,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:05:32,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 02:05:32,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:32,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 02:05:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=7579, Unknown=0, NotChecked=0, Total=8190 [2021-11-23 02:05:32,385 INFO L87 Difference]: Start difference. First operand 5006 states and 5873 transitions. Second operand has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2021-11-23 02:05:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:47,580 INFO L93 Difference]: Finished difference Result 12117 states and 14827 transitions. [2021-11-23 02:05:47,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-23 02:05:47,581 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) Word has length 114 [2021-11-23 02:05:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:47,600 INFO L225 Difference]: With dead ends: 12117 [2021-11-23 02:05:47,600 INFO L226 Difference]: Without dead ends: 8822 [2021-11-23 02:05:47,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 318 SyntacticMatches, 21 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33125 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=8449, Invalid=69113, Unknown=0, NotChecked=0, Total=77562 [2021-11-23 02:05:47,610 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 4693 mSDsluCounter, 3446 mSDsCounter, 0 mSdLazyCounter, 9342 mSolverCounterSat, 4162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 13504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4162 IncrementalHoareTripleChecker+Valid, 9342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:47,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 3276 Invalid, 13504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4162 Valid, 9342 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-23 02:05:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2021-11-23 02:05:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 5256. [2021-11-23 02:05:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 3903 states have (on average 1.1462977197027928) internal successors, (4474), 3962 states have internal predecessors, (4474), 721 states have call successors, (721), 604 states have call predecessors, (721), 630 states have return successors, (841), 690 states have call predecessors, (841), 720 states have call successors, (841) [2021-11-23 02:05:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 6036 transitions. [2021-11-23 02:05:48,387 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 6036 transitions. Word has length 114 [2021-11-23 02:05:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:48,387 INFO L470 AbstractCegarLoop]: Abstraction has 5256 states and 6036 transitions. [2021-11-23 02:05:48,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2021-11-23 02:05:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 6036 transitions. [2021-11-23 02:05:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 02:05:48,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:48,392 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:48,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:48,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-23 02:05:48,619 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:48,619 INFO L85 PathProgramCache]: Analyzing trace with hash 758017092, now seen corresponding path program 1 times [2021-11-23 02:05:48,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:48,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256505649] [2021-11-23 02:05:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:48,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:05:48,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:48,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256505649] [2021-11-23 02:05:48,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256505649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:48,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251432355] [2021-11-23 02:05:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:48,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:48,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:48,892 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:48,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 02:05:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 02:05:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:49,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:05:51,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251432355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:51,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722137423] [2021-11-23 02:05:51,584 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-23 02:05:51,584 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:51,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:51,585 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:51,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:05:56,733 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 172 for LOIs [2021-11-23 02:05:56,930 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 121 for LOIs [2021-11-23 02:05:56,954 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 60 for LOIs [2021-11-23 02:05:56,962 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 184 for LOIs [2021-11-23 02:05:57,647 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 112 for LOIs [2021-11-23 02:05:57,759 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 60 for LOIs [2021-11-23 02:05:57,844 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 176 for LOIs [2021-11-23 02:05:58,115 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 199 for LOIs [2021-11-23 02:05:58,351 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:19,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '342876#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:19,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:19,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:19,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2021-11-23 02:06:19,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055322270] [2021-11-23 02:06:19,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:19,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:06:19,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:06:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=10833, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 02:06:19,386 INFO L87 Difference]: Start difference. First operand 5256 states and 6036 transitions. Second operand has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2021-11-23 02:06:28,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:28,781 INFO L93 Difference]: Finished difference Result 7474 states and 8629 transitions. [2021-11-23 02:06:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-23 02:06:28,781 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) Word has length 124 [2021-11-23 02:06:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:28,791 INFO L225 Difference]: With dead ends: 7474 [2021-11-23 02:06:28,791 INFO L226 Difference]: Without dead ends: 6403 [2021-11-23 02:06:28,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17455 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=4401, Invalid=40331, Unknown=0, NotChecked=0, Total=44732 [2021-11-23 02:06:28,797 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 3674 mSDsluCounter, 2709 mSDsCounter, 0 mSdLazyCounter, 7962 mSolverCounterSat, 2522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3674 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 10484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2522 IncrementalHoareTripleChecker+Valid, 7962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:28,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3674 Valid, 2541 Invalid, 10484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2522 Valid, 7962 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 02:06:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2021-11-23 02:06:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 5072. [2021-11-23 02:06:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 3791 states have (on average 1.1463993669216566) internal successors, (4346), 3849 states have internal predecessors, (4346), 681 states have call successors, (681), 572 states have call predecessors, (681), 598 states have return successors, (791), 651 states have call predecessors, (791), 680 states have call successors, (791) [2021-11-23 02:06:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 5818 transitions. [2021-11-23 02:06:29,416 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 5818 transitions. Word has length 124 [2021-11-23 02:06:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:29,417 INFO L470 AbstractCegarLoop]: Abstraction has 5072 states and 5818 transitions. [2021-11-23 02:06:29,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2021-11-23 02:06:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 5818 transitions. [2021-11-23 02:06:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:06:29,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:29,420 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:29,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:29,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 02:06:29,623 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:29,623 INFO L85 PathProgramCache]: Analyzing trace with hash -295057219, now seen corresponding path program 1 times [2021-11-23 02:06:29,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:29,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207315899] [2021-11-23 02:06:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:29,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:06:29,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:29,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207315899] [2021-11-23 02:06:29,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207315899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:29,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127051804] [2021-11-23 02:06:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:29,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:29,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:29,696 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:29,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:06:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:06:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:06:30,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:06:30,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127051804] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:30,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:06:30,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2021-11-23 02:06:30,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013515653] [2021-11-23 02:06:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:30,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:06:30,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:06:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:06:30,298 INFO L87 Difference]: Start difference. First operand 5072 states and 5818 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:06:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:31,545 INFO L93 Difference]: Finished difference Result 5733 states and 6565 transitions. [2021-11-23 02:06:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:06:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2021-11-23 02:06:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:31,556 INFO L225 Difference]: With dead ends: 5733 [2021-11-23 02:06:31,556 INFO L226 Difference]: Without dead ends: 4846 [2021-11-23 02:06:31,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:06:31,560 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 389 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:31,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 403 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:06:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2021-11-23 02:06:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4803. [2021-11-23 02:06:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 3592 states have (on average 1.1417037861915367) internal successors, (4101), 3650 states have internal predecessors, (4101), 645 states have call successors, (645), 542 states have call predecessors, (645), 564 states have return successors, (750), 611 states have call predecessors, (750), 644 states have call successors, (750) [2021-11-23 02:06:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 5496 transitions. [2021-11-23 02:06:32,140 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 5496 transitions. Word has length 125 [2021-11-23 02:06:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:32,140 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 5496 transitions. [2021-11-23 02:06:32,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:06:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 5496 transitions. [2021-11-23 02:06:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 02:06:32,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:32,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:32,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:32,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 02:06:32,344 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash -754676394, now seen corresponding path program 1 times [2021-11-23 02:06:32,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:32,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172401733] [2021-11-23 02:06:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:32,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 02:06:32,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:32,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172401733] [2021-11-23 02:06:32,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172401733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:32,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:32,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:06:32,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075048349] [2021-11-23 02:06:32,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:32,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:06:32,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:06:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:32,415 INFO L87 Difference]: Start difference. First operand 4803 states and 5496 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 02:06:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:33,885 INFO L93 Difference]: Finished difference Result 11311 states and 13034 transitions. [2021-11-23 02:06:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2021-11-23 02:06:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:33,900 INFO L225 Difference]: With dead ends: 11311 [2021-11-23 02:06:33,900 INFO L226 Difference]: Without dead ends: 8571 [2021-11-23 02:06:33,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:33,907 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 311 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:33,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 709 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:06:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8571 states. [2021-11-23 02:06:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8571 to 7272. [2021-11-23 02:06:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7272 states, 5456 states have (on average 1.1548753665689149) internal successors, (6301), 5535 states have internal predecessors, (6301), 970 states have call successors, (970), 819 states have call predecessors, (970), 844 states have return successors, (1114), 918 states have call predecessors, (1114), 969 states have call successors, (1114) [2021-11-23 02:06:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7272 states to 7272 states and 8385 transitions. [2021-11-23 02:06:34,877 INFO L78 Accepts]: Start accepts. Automaton has 7272 states and 8385 transitions. Word has length 127 [2021-11-23 02:06:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:34,877 INFO L470 AbstractCegarLoop]: Abstraction has 7272 states and 8385 transitions. [2021-11-23 02:06:34,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 02:06:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7272 states and 8385 transitions. [2021-11-23 02:06:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 02:06:34,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:34,886 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:34,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-23 02:06:34,886 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1470280667, now seen corresponding path program 1 times [2021-11-23 02:06:34,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611170710] [2021-11-23 02:06:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:34,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 02:06:34,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:34,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611170710] [2021-11-23 02:06:34,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611170710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395726049] [2021-11-23 02:06:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:34,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:34,940 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:34,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:06:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:35,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:06:35,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 02:06:35,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:35,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395726049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:35,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:35,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-23 02:06:35,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101714657] [2021-11-23 02:06:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:35,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:06:35,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:06:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:35,251 INFO L87 Difference]: Start difference. First operand 7272 states and 8385 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 02:06:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:36,306 INFO L93 Difference]: Finished difference Result 14469 states and 16551 transitions. [2021-11-23 02:06:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:36,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 158 [2021-11-23 02:06:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:36,319 INFO L225 Difference]: With dead ends: 14469 [2021-11-23 02:06:36,319 INFO L226 Difference]: Without dead ends: 7964 [2021-11-23 02:06:36,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:36,328 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 156 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:36,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 526 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7964 states. [2021-11-23 02:06:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7964 to 7934. [2021-11-23 02:06:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 5908 states have (on average 1.1113744075829384) internal successors, (6566), 5993 states have internal predecessors, (6566), 1100 states have call successors, (1100), 901 states have call predecessors, (1100), 924 states have return successors, (1228), 1040 states have call predecessors, (1228), 1099 states have call successors, (1228) [2021-11-23 02:06:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 8894 transitions. [2021-11-23 02:06:37,312 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 8894 transitions. Word has length 158 [2021-11-23 02:06:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:37,312 INFO L470 AbstractCegarLoop]: Abstraction has 7934 states and 8894 transitions. [2021-11-23 02:06:37,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 02:06:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 8894 transitions. [2021-11-23 02:06:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-23 02:06:37,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:37,319 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:37,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:37,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 02:06:37,535 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2032070462, now seen corresponding path program 1 times [2021-11-23 02:06:37,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:37,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991019013] [2021-11-23 02:06:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:37,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 02:06:37,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991019013] [2021-11-23 02:06:37,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991019013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376595574] [2021-11-23 02:06:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:37,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:37,615 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:37,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 02:06:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:37,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:06:37,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-23 02:06:38,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:38,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376595574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:38,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:38,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-23 02:06:38,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693644501] [2021-11-23 02:06:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:38,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:06:38,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:06:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:38,049 INFO L87 Difference]: Start difference. First operand 7934 states and 8894 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:06:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:39,068 INFO L93 Difference]: Finished difference Result 11868 states and 13296 transitions. [2021-11-23 02:06:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 159 [2021-11-23 02:06:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:39,080 INFO L225 Difference]: With dead ends: 11868 [2021-11-23 02:06:39,080 INFO L226 Difference]: Without dead ends: 6108 [2021-11-23 02:06:39,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:06:39,088 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 167 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:39,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 509 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2021-11-23 02:06:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 6029. [2021-11-23 02:06:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 4484 states have (on average 1.1048171275646743) internal successors, (4954), 4553 states have internal predecessors, (4954), 832 states have call successors, (832), 684 states have call predecessors, (832), 711 states have return successors, (928), 792 states have call predecessors, (928), 831 states have call successors, (928) [2021-11-23 02:06:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 6714 transitions. [2021-11-23 02:06:39,992 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 6714 transitions. Word has length 159 [2021-11-23 02:06:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:39,993 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 6714 transitions. [2021-11-23 02:06:39,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:06:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 6714 transitions. [2021-11-23 02:06:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 02:06:39,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:39,997 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:40,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:40,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:40,197 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash 264810841, now seen corresponding path program 1 times [2021-11-23 02:06:40,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611081056] [2021-11-23 02:06:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:40,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 89 proven. 15 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 02:06:40,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611081056] [2021-11-23 02:06:40,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611081056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:40,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111589862] [2021-11-23 02:06:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:40,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:40,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:40,288 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:40,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 02:06:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:40,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:06:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:06:40,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:40,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111589862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:40,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:40,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2021-11-23 02:06:40,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635012856] [2021-11-23 02:06:40,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:40,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:06:40,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:40,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:06:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:40,667 INFO L87 Difference]: Start difference. First operand 6029 states and 6714 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-23 02:06:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:41,265 INFO L93 Difference]: Finished difference Result 6519 states and 7254 transitions. [2021-11-23 02:06:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:06:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 160 [2021-11-23 02:06:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:41,267 INFO L225 Difference]: With dead ends: 6519 [2021-11-23 02:06:41,267 INFO L226 Difference]: Without dead ends: 693 [2021-11-23 02:06:41,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:06:41,273 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 173 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:41,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 458 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:06:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-11-23 02:06:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2021-11-23 02:06:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 474 states have (on average 1.1033755274261603) internal successors, (523), 484 states have internal predecessors, (523), 108 states have call successors, (108), 92 states have call predecessors, (108), 110 states have return successors, (137), 116 states have call predecessors, (137), 107 states have call successors, (137) [2021-11-23 02:06:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 768 transitions. [2021-11-23 02:06:41,367 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 768 transitions. Word has length 160 [2021-11-23 02:06:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:41,367 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 768 transitions. [2021-11-23 02:06:41,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-23 02:06:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 768 transitions. [2021-11-23 02:06:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-23 02:06:41,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:41,369 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:41,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:41,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:41,570 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1134278309, now seen corresponding path program 1 times [2021-11-23 02:06:41,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:41,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996083538] [2021-11-23 02:06:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:41,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 115 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-23 02:06:41,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996083538] [2021-11-23 02:06:41,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996083538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486068673] [2021-11-23 02:06:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:41,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:41,800 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:41,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 02:06:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:06:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 02:06:42,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:42,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486068673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:42,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:42,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [19] total 26 [2021-11-23 02:06:42,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675456747] [2021-11-23 02:06:42,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:42,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:06:42,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:06:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:06:42,312 INFO L87 Difference]: Start difference. First operand 693 states and 768 transitions. Second operand has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-23 02:06:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:42,476 INFO L93 Difference]: Finished difference Result 946 states and 1046 transitions. [2021-11-23 02:06:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:06:42,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) Word has length 220 [2021-11-23 02:06:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:42,477 INFO L225 Difference]: With dead ends: 946 [2021-11-23 02:06:42,477 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:06:42,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:06:42,479 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 43 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:42,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 678 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:42,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:06:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:06:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-23 02:06:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:06:42,480 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 220 [2021-11-23 02:06:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:42,480 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:06:42,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-23 02:06:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:06:42,481 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:06:42,485 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 02:06:42,485 INFO L764 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 02:06:42,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:42,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886761f9-a09f-4034-813e-85ff76a0722d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:42,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 02:07:14,806 WARN L227 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 199 DAG size of output: 197 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-23 02:07:24,717 WARN L227 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 199 DAG size of output: 197 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-23 02:07:34,963 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 354 DAG size of output: 348 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-23 02:08:11,477 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 354 DAG size of output: 348 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-23 02:08:53,627 WARN L227 SmtUtils]: Spent 11.91s on a formula simplification. DAG size of input: 819 DAG size of output: 295 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-23 02:09:06,772 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 498 DAG size of output: 225 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)