./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF --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 74f9bd5bd4d02445cc8b51e0daba1f22f33c6c5b4db852fb1ac615d474112387 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:34:07,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:34:07,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:34:07,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:34:07,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:34:07,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:34:07,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:34:07,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:34:07,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:34:07,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:34:07,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:34:07,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:34:07,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:34:07,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:34:07,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:34:07,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:34:07,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:34:07,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:34:07,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:34:07,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:34:07,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:34:07,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:34:07,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:34:07,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:34:07,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:34:07,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:34:07,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:34:07,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:34:07,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:34:07,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:34:07,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:34:07,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:34:07,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:34:07,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:34:07,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:34:07,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:34:07,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:34:07,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:34:07,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:34:07,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:34:07,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:34:07,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:34:07,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:34:07,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:34:07,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:34:07,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:34:07,374 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:34:07,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:34:07,374 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:34:07,374 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:34:07,374 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:34:07,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:34:07,375 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:34:07,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:34:07,375 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:34:07,375 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:34:07,376 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:34:07,376 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:34:07,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:34:07,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:34:07,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:34:07,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:34:07,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:34:07,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:34:07,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:34:07,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:34:07,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:34:07,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:34:07,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:34:07,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:34:07,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:34:07,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:34:07,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:34:07,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:07,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:34:07,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:34:07,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:34:07,380 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:34:07,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:34:07,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:34:07,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:34:07,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:34:07,381 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_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74f9bd5bd4d02445cc8b51e0daba1f22f33c6c5b4db852fb1ac615d474112387 [2021-11-13 01:34:07,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:34:07,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:34:07,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:34:07,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:34:07,720 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:34:07,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c [2021-11-13 01:34:07,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/data/2734149fc/048fa109fdcd48a78155ba9ef7b0a986/FLAG72dc22d51 [2021-11-13 01:34:08,871 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:34:08,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c [2021-11-13 01:34:08,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/data/2734149fc/048fa109fdcd48a78155ba9ef7b0a986/FLAG72dc22d51 [2021-11-13 01:34:09,299 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/data/2734149fc/048fa109fdcd48a78155ba9ef7b0a986 [2021-11-13 01:34:09,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:34:09,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:34:09,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:09,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:34:09,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:34:09,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:09" (1/1) ... [2021-11-13 01:34:09,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2a4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:09, skipping insertion in model container [2021-11-13 01:34:09,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:09" (1/1) ... [2021-11-13 01:34:09,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:34:09,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:11,890 WARN L228 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_b0a06a5c-d3e9-477a-916b-18217ecb5c00/sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c[377069,377082] [2021-11-13 01:34:11,938 WARN L228 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_b0a06a5c-d3e9-477a-916b-18217ecb5c00/sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c[383339,383352] [2021-11-13 01:34:12,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:12,348 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:34:13,791 WARN L228 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_b0a06a5c-d3e9-477a-916b-18217ecb5c00/sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c[377069,377082] [2021-11-13 01:34:13,807 WARN L228 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_b0a06a5c-d3e9-477a-916b-18217ecb5c00/sv-benchmarks/c/combinations/Problem05_label40+token_ring.11.cil-2.c[383339,383352] [2021-11-13 01:34:13,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:14,051 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:34:14,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14 WrapperNode [2021-11-13 01:34:14,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:14,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:14,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:34:14,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:34:14,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:14,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:14,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:14,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:34:14,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:34:14,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:34:14,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:14,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:15,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:15,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:15,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:15,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:15,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:15,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:34:15,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:34:15,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:34:15,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:34:15,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (1/1) ... [2021-11-13 01:34:15,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:15,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:34:15,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:34:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:34:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 01:34:15,884 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 01:34:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 01:34:15,884 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 01:34:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 01:34:15,885 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 01:34:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 01:34:15,885 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 01:34:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 01:34:15,885 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 01:34:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 01:34:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 01:34:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:34:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:34:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:34:28,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:34:28,462 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-13 01:34:28,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:28 BoogieIcfgContainer [2021-11-13 01:34:28,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:34:28,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:34:28,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:34:28,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:34:28,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:34:09" (1/3) ... [2021-11-13 01:34:28,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ea0341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:28, skipping insertion in model container [2021-11-13 01:34:28,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:14" (2/3) ... [2021-11-13 01:34:28,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ea0341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:28, skipping insertion in model container [2021-11-13 01:34:28,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:28" (3/3) ... [2021-11-13 01:34:28,479 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.11.cil-2.c [2021-11-13 01:34:28,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:34:28,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 01:34:28,565 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:34:28,574 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 [2021-11-13 01:34:28,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 01:34:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-13 01:34:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 01:34:28,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:28,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:28,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 112236036, now seen corresponding path program 1 times [2021-11-13 01:34:28,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:28,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547039238] [2021-11-13 01:34:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:28,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:29,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:29,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547039238] [2021-11-13 01:34:29,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547039238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:29,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:29,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:34:29,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549026481] [2021-11-13 01:34:29,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:29,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:34:29,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:29,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:34:29,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:34:29,251 INFO L87 Difference]: Start difference. First operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-13 01:34:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:30,377 INFO L93 Difference]: Finished difference Result 3800 states and 7371 transitions. [2021-11-13 01:34:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 64 [2021-11-13 01:34:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:30,413 INFO L225 Difference]: With dead ends: 3800 [2021-11-13 01:34:30,413 INFO L226 Difference]: Without dead ends: 1979 [2021-11-13 01:34:30,422 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 [2021-11-13 01:34:30,425 INFO L933 BasicCegarLoop]: 3481 mSDtfsCounter, 3746 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 640.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.50ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 891.15ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:30,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3746 Valid, 6868 Invalid, 724 Unknown, 0 Unchecked, 40.50ms Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 891.15ms Time] [2021-11-13 01:34:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-11-13 01:34:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2021-11-13 01:34:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1918 states have (on average 1.9228362877997915) internal successors, (3688), 1921 states have internal predecessors, (3688), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-13 01:34:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3780 transitions. [2021-11-13 01:34:30,597 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3780 transitions. Word has length 64 [2021-11-13 01:34:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:30,598 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3780 transitions. [2021-11-13 01:34:30,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-13 01:34:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3780 transitions. [2021-11-13 01:34:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:34:30,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:30,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:30,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:34:30,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1523347519, now seen corresponding path program 1 times [2021-11-13 01:34:30,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:30,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079751964] [2021-11-13 01:34:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:30,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:30,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:30,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079751964] [2021-11-13 01:34:30,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079751964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:30,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033711680] [2021-11-13 01:34:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:30,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:30,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:30,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:30,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:34:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:31,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:31,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:34:31,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:34:31,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033711680] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:31,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:31,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 01:34:31,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437820424] [2021-11-13 01:34:31,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:31,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:31,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:31,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:31,698 INFO L87 Difference]: Start difference. First operand 1978 states and 3780 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:32,197 INFO L93 Difference]: Finished difference Result 2635 states and 4805 transitions. [2021-11-13 01:34:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:32,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-11-13 01:34:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:32,225 INFO L225 Difference]: With dead ends: 2635 [2021-11-13 01:34:32,225 INFO L226 Difference]: Without dead ends: 2303 [2021-11-13 01:34:32,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:32,230 INFO L933 BasicCegarLoop]: 3326 mSDtfsCounter, 3501 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 400.64ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:32,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3501 Valid, 3536 Invalid, 312 Unknown, 0 Unchecked, 12.72ms Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 400.64ms Time] [2021-11-13 01:34:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-11-13 01:34:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2021-11-13 01:34:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2187 states have (on average 1.8715134887974394) internal successors, (4093), 2191 states have internal predecessors, (4093), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:34:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4265 transitions. [2021-11-13 01:34:32,355 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4265 transitions. Word has length 129 [2021-11-13 01:34:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:32,356 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 4265 transitions. [2021-11-13 01:34:32,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4265 transitions. [2021-11-13 01:34:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:34:32,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:32,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:32,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:32,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:32,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1011963905, now seen corresponding path program 1 times [2021-11-13 01:34:32,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:32,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104587637] [2021-11-13 01:34:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:32,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:32,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:32,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104587637] [2021-11-13 01:34:32,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104587637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:32,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529949090] [2021-11-13 01:34:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:32,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:32,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:32,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:34:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:32,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 01:34:33,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 01:34:33,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529949090] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:33,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 01:34:33,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173615232] [2021-11-13 01:34:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:33,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:33,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:33,522 INFO L87 Difference]: Start difference. First operand 2299 states and 4265 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:34,081 INFO L93 Difference]: Finished difference Result 3592 states and 6276 transitions. [2021-11-13 01:34:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:34,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-11-13 01:34:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:34,106 INFO L225 Difference]: With dead ends: 3592 [2021-11-13 01:34:34,107 INFO L226 Difference]: Without dead ends: 2939 [2021-11-13 01:34:34,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:34,115 INFO L933 BasicCegarLoop]: 3325 mSDtfsCounter, 3507 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.81ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 398.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:34,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3507 Valid, 3535 Invalid, 312 Unknown, 0 Unchecked, 14.81ms Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 398.61ms Time] [2021-11-13 01:34:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-11-13 01:34:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2021-11-13 01:34:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2719 states have (on average 1.7988230967267378) internal successors, (4891), 2725 states have internal predecessors, (4891), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2021-11-13 01:34:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5219 transitions. [2021-11-13 01:34:34,290 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5219 transitions. Word has length 129 [2021-11-13 01:34:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:34,292 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 5219 transitions. [2021-11-13 01:34:34,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5219 transitions. [2021-11-13 01:34:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:34:34,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:34,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:34,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:34,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:34,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1060772285, now seen corresponding path program 1 times [2021-11-13 01:34:34,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:34,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145818749] [2021-11-13 01:34:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:34,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:34,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:34,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145818749] [2021-11-13 01:34:34,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145818749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:34,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682926866] [2021-11-13 01:34:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:34,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:34,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:34,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:34,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 01:34:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:34:35,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:34:35,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682926866] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:35,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:35,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 01:34:35,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502965537] [2021-11-13 01:34:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:35,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:35,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:35,539 INFO L87 Difference]: Start difference. First operand 2933 states and 5219 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:36,201 INFO L93 Difference]: Finished difference Result 5482 states and 9168 transitions. [2021-11-13 01:34:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-11-13 01:34:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:36,232 INFO L225 Difference]: With dead ends: 5482 [2021-11-13 01:34:36,232 INFO L226 Difference]: Without dead ends: 4195 [2021-11-13 01:34:36,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:36,240 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3510 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 396.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 508.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:36,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3510 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 10.61ms Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 508.59ms Time] [2021-11-13 01:34:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-11-13 01:34:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2021-11-13 01:34:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3771 states have (on average 1.7138690002651817) internal successors, (6463), 3781 states have internal predecessors, (6463), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2021-11-13 01:34:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 7095 transitions. [2021-11-13 01:34:36,419 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 7095 transitions. Word has length 129 [2021-11-13 01:34:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:36,419 INFO L470 AbstractCegarLoop]: Abstraction has 4185 states and 7095 transitions. [2021-11-13 01:34:36,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 7095 transitions. [2021-11-13 01:34:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:34:36,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:36,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:36,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:36,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:36,656 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1199793983, now seen corresponding path program 1 times [2021-11-13 01:34:36,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:36,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362399712] [2021-11-13 01:34:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:36,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:36,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:36,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362399712] [2021-11-13 01:34:36,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362399712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:36,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470389884] [2021-11-13 01:34:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:36,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:36,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:36,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 01:34:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:36,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:34:37,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:34:37,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470389884] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:37,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:37,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 01:34:37,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695467952] [2021-11-13 01:34:37,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:37,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:37,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:37,441 INFO L87 Difference]: Start difference. First operand 4185 states and 7095 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:37,999 INFO L93 Difference]: Finished difference Result 9214 states and 14852 transitions. [2021-11-13 01:34:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:38,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-11-13 01:34:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:38,047 INFO L225 Difference]: With dead ends: 9214 [2021-11-13 01:34:38,047 INFO L226 Difference]: Without dead ends: 6675 [2021-11-13 01:34:38,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:38,061 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3489 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 294.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.94ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 352.12ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:38,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 10.94ms Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 352.12ms Time] [2021-11-13 01:34:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2021-11-13 01:34:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2021-11-13 01:34:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5851 states have (on average 1.6337378225944283) internal successors, (9559), 5869 states have internal predecessors, (9559), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2021-11-13 01:34:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10783 transitions. [2021-11-13 01:34:38,372 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10783 transitions. Word has length 129 [2021-11-13 01:34:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:38,372 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 10783 transitions. [2021-11-13 01:34:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10783 transitions. [2021-11-13 01:34:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:34:38,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:38,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:38,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:38,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:38,612 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1235381373, now seen corresponding path program 1 times [2021-11-13 01:34:38,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:38,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394539468] [2021-11-13 01:34:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:38,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:38,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:38,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394539468] [2021-11-13 01:34:38,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394539468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:38,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25693257] [2021-11-13 01:34:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:38,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:38,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:38,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 01:34:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:34:39,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 01:34:39,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25693257] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:39,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:39,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 01:34:39,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298701184] [2021-11-13 01:34:39,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:39,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:39,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:39,314 INFO L87 Difference]: Start difference. First operand 6657 states and 10783 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:40,024 INFO L93 Difference]: Finished difference Result 16582 states and 26020 transitions. [2021-11-13 01:34:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:40,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-11-13 01:34:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:40,117 INFO L225 Difference]: With dead ends: 16582 [2021-11-13 01:34:40,117 INFO L226 Difference]: Without dead ends: 11571 [2021-11-13 01:34:40,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:40,142 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3483 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.98ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:40,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 11.51ms Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 360.98ms Time] [2021-11-13 01:34:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2021-11-13 01:34:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2021-11-13 01:34:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 9963 states have (on average 1.571313861286761) internal successors, (15655), 9997 states have internal predecessors, (15655), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2021-11-13 01:34:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 18031 transitions. [2021-11-13 01:34:40,816 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 18031 transitions. Word has length 129 [2021-11-13 01:34:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:40,817 INFO L470 AbstractCegarLoop]: Abstraction has 11537 states and 18031 transitions. [2021-11-13 01:34:40,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 18031 transitions. [2021-11-13 01:34:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:34:40,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:40,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:40,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:41,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 01:34:41,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 70928325, now seen corresponding path program 1 times [2021-11-13 01:34:41,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:41,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131858681] [2021-11-13 01:34:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:41,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:34:41,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:41,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131858681] [2021-11-13 01:34:41,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131858681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:41,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623090645] [2021-11-13 01:34:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:41,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:41,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:41,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:41,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 01:34:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:41,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 01:34:41,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 01:34:41,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623090645] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:41,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 01:34:41,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031402966] [2021-11-13 01:34:41,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:41,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:41,872 INFO L87 Difference]: Start difference. First operand 11537 states and 18031 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:42,845 INFO L93 Difference]: Finished difference Result 31126 states and 47956 transitions. [2021-11-13 01:34:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:42,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-11-13 01:34:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:42,931 INFO L225 Difference]: With dead ends: 31126 [2021-11-13 01:34:42,935 INFO L226 Difference]: Without dead ends: 21235 [2021-11-13 01:34:42,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:34:42,985 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3495 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.39ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 384.98ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:42,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3495 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 12.39ms Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 384.98ms Time] [2021-11-13 01:34:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21235 states. [2021-11-13 01:34:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21235 to 21169. [2021-11-13 01:34:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 18091 states have (on average 1.5286606599966834) internal successors, (27655), 18157 states have internal predecessors, (27655), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2021-11-13 01:34:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 32271 transitions. [2021-11-13 01:34:43,851 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 32271 transitions. Word has length 129 [2021-11-13 01:34:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:43,852 INFO L470 AbstractCegarLoop]: Abstraction has 21169 states and 32271 transitions. [2021-11-13 01:34:43,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:34:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 32271 transitions. [2021-11-13 01:34:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:34:43,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:43,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:43,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:44,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a06a5c-d3e9-477a-916b-18217ecb5c00/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:44,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash 108046599, now seen corresponding path program 1 times [2021-11-13 01:34:44,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:44,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553223567] [2021-11-13 01:34:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:44,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 01:34:44,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:44,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553223567] [2021-11-13 01:34:44,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553223567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:44,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:44,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:34:44,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833405553] [2021-11-13 01:34:44,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:44,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:44,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:44,272 INFO L87 Difference]: Start difference. First operand 21169 states and 32271 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-11-13 01:34:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:47,225 INFO L93 Difference]: Finished difference Result 66869 states and 100498 transitions. [2021-11-13 01:34:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:34:47,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 129 [2021-11-13 01:34:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:47,487 INFO L225 Difference]: With dead ends: 66869 [2021-11-13 01:34:47,487 INFO L226 Difference]: Without dead ends: 47347 [2021-11-13 01:34:47,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:34:47,568 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 4189 mSDsluCounter, 7037 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 660.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4209 SdHoareTripleChecker+Valid, 9835 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.08ms SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 796.16ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:47,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4209 Valid, 9835 Invalid, 1056 Unknown, 0 Unchecked, 41.08ms Time], IncrementalHoareTripleChecker [140 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 796.16ms Time] [2021-11-13 01:34:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2021-11-13 01:34:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 39921. [2021-11-13 01:34:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39921 states, 33899 states have (on average 1.5011357267176022) internal successors, (50887), 34029 states have internal predecessors, (50887), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2021-11-13 01:34:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39921 states to 39921 states and 59855 transitions. [2021-11-13 01:34:49,721 INFO L78 Accepts]: Start accepts. Automaton has 39921 states and 59855 transitions. Word has length 129 [2021-11-13 01:34:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:49,723 INFO L470 AbstractCegarLoop]: Abstraction has 39921 states and 59855 transitions. [2021-11-13 01:34:49,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-11-13 01:34:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 39921 states and 59855 transitions. [2021-11-13 01:34:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 01:34:49,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:49,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:49,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 01:34:49,993 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -277202940, now seen corresponding path program 1 times [2021-11-13 01:34:49,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:49,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428431602] [2021-11-13 01:34:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:49,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 01:34:50,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:50,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428431602] [2021-11-13 01:34:50,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428431602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:50,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:50,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:34:50,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137321028] [2021-11-13 01:34:50,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:50,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:50,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:50,134 INFO L87 Difference]: Start difference. First operand 39921 states and 59855 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-11-13 01:34:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:54,026 INFO L93 Difference]: Finished difference Result 125941 states and 187986 transitions. [2021-11-13 01:34:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:34:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 130 [2021-11-13 01:34:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:54,410 INFO L225 Difference]: With dead ends: 125941 [2021-11-13 01:34:54,410 INFO L226 Difference]: Without dead ends: 87667 [2021-11-13 01:34:54,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:34:54,497 INFO L933 BasicCegarLoop]: 3276 mSDtfsCounter, 4153 mSDsluCounter, 6998 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 836.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4173 SdHoareTripleChecker+Valid, 9771 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.11ms SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 989.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:54,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4173 Valid, 9771 Invalid, 1054 Unknown, 0 Unchecked, 31.11ms Time], IncrementalHoareTripleChecker [152 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 989.60ms Time] [2021-11-13 01:34:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87667 states. [2021-11-13 01:34:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87667 to 76657. [2021-11-13 01:34:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76657 states, 64875 states have (on average 1.4828362235067438) internal successors, (96199), 65133 states have internal predecessors, (96199), 8708 states have call successors, (8708), 3072 states have call predecessors, (8708), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2021-11-13 01:34:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76657 states to 76657 states and 113615 transitions. [2021-11-13 01:34:58,535 INFO L78 Accepts]: Start accepts. Automaton has 76657 states and 113615 transitions. Word has length 130 [2021-11-13 01:34:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:58,536 INFO L470 AbstractCegarLoop]: Abstraction has 76657 states and 113615 transitions. [2021-11-13 01:34:58,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-11-13 01:34:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 76657 states and 113615 transitions. [2021-11-13 01:34:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 01:34:58,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:58,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:58,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 01:34:58,637 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1497528025, now seen corresponding path program 1 times [2021-11-13 01:34:58,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:58,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347981627] [2021-11-13 01:34:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:58,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 01:34:58,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:58,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347981627] [2021-11-13 01:34:58,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347981627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:58,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:58,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:34:58,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724742411] [2021-11-13 01:34:58,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:58,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:58,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:58,770 INFO L87 Difference]: Start difference. First operand 76657 states and 113615 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-13 01:35:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:06,200 INFO L93 Difference]: Finished difference Result 264565 states and 390098 transitions. [2021-11-13 01:35:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:35:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 131 [2021-11-13 01:35:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:07,203 INFO L225 Difference]: With dead ends: 264565 [2021-11-13 01:35:07,203 INFO L226 Difference]: Without dead ends: 189555 [2021-11-13 01:35:07,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:35:07,418 INFO L933 BasicCegarLoop]: 3296 mSDtfsCounter, 4307 mSDsluCounter, 7045 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 762.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4327 SdHoareTripleChecker+Valid, 9830 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.69ms SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 938.12ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:07,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4327 Valid, 9830 Invalid, 1059 Unknown, 0 Unchecked, 25.69ms Time], IncrementalHoareTripleChecker [140 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 938.12ms Time] [2021-11-13 01:35:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189555 states. [2021-11-13 01:35:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189555 to 148593. [2021-11-13 01:35:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148593 states, 125547 states have (on average 1.4697205030785283) internal successors, (184519), 126061 states have internal predecessors, (184519), 16900 states have call successors, (16900), 6144 states have call predecessors, (16900), 6144 states have return successors, (16900), 16388 states have call predecessors, (16900), 16900 states have call successors, (16900) [2021-11-13 01:35:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148593 states to 148593 states and 218319 transitions. [2021-11-13 01:35:14,885 INFO L78 Accepts]: Start accepts. Automaton has 148593 states and 218319 transitions. Word has length 131 [2021-11-13 01:35:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:14,886 INFO L470 AbstractCegarLoop]: Abstraction has 148593 states and 218319 transitions. [2021-11-13 01:35:14,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-13 01:35:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 148593 states and 218319 transitions. [2021-11-13 01:35:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 01:35:15,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:15,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:35:15,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 01:35:15,072 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:15,073 INFO L85 PathProgramCache]: Analyzing trace with hash 57198432, now seen corresponding path program 1 times [2021-11-13 01:35:15,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:35:15,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626293010] [2021-11-13 01:35:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:15,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:35:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 01:35:15,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:35:15,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626293010] [2021-11-13 01:35:15,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626293010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:15,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:15,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:35:15,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524799637] [2021-11-13 01:35:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:15,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:35:15,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:35:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:35:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:35:15,207 INFO L87 Difference]: Start difference. First operand 148593 states and 218319 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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)