./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI --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 cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:53:12,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:53:12,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:53:12,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:53:12,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:53:12,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:53:12,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:53:12,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:53:12,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:53:12,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:53:12,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:53:12,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:53:12,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:53:12,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:53:12,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:53:12,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:53:12,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:53:12,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:53:12,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:53:12,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:53:12,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:53:12,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:53:12,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:53:12,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:53:12,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:53:12,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:53:12,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:53:12,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:53:12,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:53:12,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:53:12,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:53:12,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:53:12,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:53:12,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:53:12,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:53:12,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:53:12,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:53:12,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:53:12,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:53:12,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:53:12,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:53:12,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:53:12,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:53:12,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:53:12,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:53:12,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:53:12,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:53:12,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:53:12,452 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:53:12,452 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:53:12,453 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:53:12,453 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:53:12,455 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:53:12,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:53:12,455 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:53:12,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:53:12,456 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:53:12,457 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:53:12,457 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:53:12,457 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:53:12,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:53:12,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:53:12,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:53:12,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:53:12,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:53:12,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:53:12,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:53:12,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:53:12,462 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:53:12,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:53:12,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:53:12,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:53:12,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:53:12,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:53:12,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:53:12,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:53:12,467 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:53:12,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:53:12,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:53:12,468 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:53:12,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:53:12,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:53:12,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:53:12,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2022-11-03 03:53:12,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:53:12,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:53:12,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:53:12,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:53:12,981 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:53:12,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-11-03 03:53:13,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/data/c1fd953da/68d30acec5054aa1bfcdb7a00f4eb6fc/FLAG5686048b7 [2022-11-03 03:53:13,753 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:53:13,754 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-11-03 03:53:13,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/data/c1fd953da/68d30acec5054aa1bfcdb7a00f4eb6fc/FLAG5686048b7 [2022-11-03 03:53:13,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/data/c1fd953da/68d30acec5054aa1bfcdb7a00f4eb6fc [2022-11-03 03:53:13,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:53:13,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:53:13,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:13,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:53:13,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:53:13,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:13" (1/1) ... [2022-11-03 03:53:13,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35daeddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:13, skipping insertion in model container [2022-11-03 03:53:13,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:13" (1/1) ... [2022-11-03 03:53:13,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:53:14,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:53:14,854 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-11-03 03:53:14,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:14,878 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:53:15,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-11-03 03:53:15,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:15,098 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:53:15,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15 WrapperNode [2022-11-03 03:53:15,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:15,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:15,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:53:15,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:53:15,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,248 INFO L138 Inliner]: procedures = 89, calls = 327, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 771 [2022-11-03 03:53:15,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:15,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:53:15,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:53:15,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:53:15,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,329 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:53:15,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:53:15,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:53:15,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:53:15,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (1/1) ... [2022-11-03 03:53:15,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:53:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:15,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:53:15,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:53:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:53:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:53:15,473 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:53:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:53:15,473 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:53:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:53:15,474 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:53:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:53:15,474 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:53:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:53:15,475 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:53:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:53:15,475 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:53:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:53:15,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:53:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:53:15,476 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:53:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:53:15,477 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:53:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:53:15,477 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:53:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:53:15,478 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:53:15,478 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:53:15,478 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:53:15,478 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:53:15,479 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:53:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:53:15,479 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:53:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:53:15,481 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:53:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-03 03:53:15,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-03 03:53:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:53:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:53:15,482 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:53:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:53:15,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:53:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:53:15,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:53:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:53:15,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:53:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:53:15,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:53:15,654 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:53:15,657 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:53:17,128 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:53:18,080 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:53:18,080 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:53:18,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:18 BoogieIcfgContainer [2022-11-03 03:53:18,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:53:18,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:53:18,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:53:18,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:53:18,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:53:13" (1/3) ... [2022-11-03 03:53:18,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3157c0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:18, skipping insertion in model container [2022-11-03 03:53:18,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:15" (2/3) ... [2022-11-03 03:53:18,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3157c0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:18, skipping insertion in model container [2022-11-03 03:53:18,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:18" (3/3) ... [2022-11-03 03:53:18,101 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2022-11-03 03:53:18,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:53:18,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:53:18,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:53:18,228 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@230cb51f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:53:18,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:53:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-03 03:53:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 03:53:18,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:18,259 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:53:18,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash 751116243, now seen corresponding path program 1 times [2022-11-03 03:53:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:18,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288092308] [2022-11-03 03:53:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:18,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:18,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288092308] [2022-11-03 03:53:18,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288092308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:18,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:18,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:53:18,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810199388] [2022-11-03 03:53:18,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:18,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:53:18,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:53:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:53:18,936 INFO L87 Difference]: Start difference. First operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 03:53:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:19,187 INFO L93 Difference]: Finished difference Result 350 states and 563 transitions. [2022-11-03 03:53:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:53:19,190 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2022-11-03 03:53:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:19,223 INFO L225 Difference]: With dead ends: 350 [2022-11-03 03:53:19,223 INFO L226 Difference]: Without dead ends: 328 [2022-11-03 03:53:19,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:53:19,231 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:19,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-03 03:53:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-11-03 03:53:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 225 states have (on average 1.6177777777777778) internal successors, (364), 244 states have internal predecessors, (364), 83 states have call successors, (83), 20 states have call predecessors, (83), 19 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 03:53:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2022-11-03 03:53:19,314 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 51 [2022-11-03 03:53:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:19,317 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2022-11-03 03:53:19,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 03:53:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2022-11-03 03:53:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 03:53:19,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:19,324 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:53:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:53:19,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1743434788, now seen corresponding path program 1 times [2022-11-03 03:53:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:19,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120037738] [2022-11-03 03:53:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:19,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:19,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:19,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120037738] [2022-11-03 03:53:19,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120037738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:19,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:19,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:53:19,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233224734] [2022-11-03 03:53:19,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:19,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:53:19,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:19,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:53:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:53:19,982 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 03:53:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:23,294 INFO L93 Difference]: Finished difference Result 1093 states and 1782 transitions. [2022-11-03 03:53:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:53:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-11-03 03:53:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:23,302 INFO L225 Difference]: With dead ends: 1093 [2022-11-03 03:53:23,303 INFO L226 Difference]: Without dead ends: 781 [2022-11-03 03:53:23,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:53:23,309 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 1575 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:23,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 1772 Invalid, 2502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [485 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:53:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-11-03 03:53:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 743. [2022-11-03 03:53:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 530 states have (on average 1.6471698113207547) internal successors, (873), 565 states have internal predecessors, (873), 171 states have call successors, (171), 39 states have call predecessors, (171), 41 states have return successors, (172), 163 states have call predecessors, (172), 166 states have call successors, (172) [2022-11-03 03:53:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1216 transitions. [2022-11-03 03:53:23,415 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1216 transitions. Word has length 52 [2022-11-03 03:53:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:23,415 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1216 transitions. [2022-11-03 03:53:23,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 03:53:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1216 transitions. [2022-11-03 03:53:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 03:53:23,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:23,420 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:53:23,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:53:23,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1616890586, now seen corresponding path program 1 times [2022-11-03 03:53:23,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042133977] [2022-11-03 03:53:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:23,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042133977] [2022-11-03 03:53:23,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042133977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:23,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:23,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:53:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957017742] [2022-11-03 03:53:23,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:23,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:23,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:23,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:23,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:53:23,677 INFO L87 Difference]: Start difference. First operand 743 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 03:53:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:23,933 INFO L93 Difference]: Finished difference Result 1231 states and 2018 transitions. [2022-11-03 03:53:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:53:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2022-11-03 03:53:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:23,941 INFO L225 Difference]: With dead ends: 1231 [2022-11-03 03:53:23,941 INFO L226 Difference]: Without dead ends: 791 [2022-11-03 03:53:23,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:53:23,945 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 30 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:23,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2005 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:53:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-03 03:53:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 755. [2022-11-03 03:53:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 539 states have (on average 1.6363636363636365) internal successors, (882), 574 states have internal predecessors, (882), 171 states have call successors, (171), 39 states have call predecessors, (171), 44 states have return successors, (178), 166 states have call predecessors, (178), 166 states have call successors, (178) [2022-11-03 03:53:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1231 transitions. [2022-11-03 03:53:24,019 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1231 transitions. Word has length 56 [2022-11-03 03:53:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:24,020 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1231 transitions. [2022-11-03 03:53:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 03:53:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1231 transitions. [2022-11-03 03:53:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 03:53:24,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:24,024 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:53:24,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:53:24,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1771186690, now seen corresponding path program 1 times [2022-11-03 03:53:24,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:24,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364340536] [2022-11-03 03:53:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:24,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:24,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364340536] [2022-11-03 03:53:24,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364340536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:24,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:24,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:53:24,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583447127] [2022-11-03 03:53:24,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:24,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:53:24,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:24,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:53:24,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:53:24,486 INFO L87 Difference]: Start difference. First operand 755 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 03:53:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:27,146 INFO L93 Difference]: Finished difference Result 1689 states and 2743 transitions. [2022-11-03 03:53:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:53:27,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-11-03 03:53:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:27,156 INFO L225 Difference]: With dead ends: 1689 [2022-11-03 03:53:27,157 INFO L226 Difference]: Without dead ends: 1141 [2022-11-03 03:53:27,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:53:27,162 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 2320 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2448 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:27,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2448 Valid, 1263 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [994 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:53:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-11-03 03:53:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1069. [2022-11-03 03:53:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5890957446808511) internal successors, (1195), 804 states have internal predecessors, (1195), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-11-03 03:53:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1703 transitions. [2022-11-03 03:53:27,265 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1703 transitions. Word has length 60 [2022-11-03 03:53:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:27,266 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1703 transitions. [2022-11-03 03:53:27,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 03:53:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1703 transitions. [2022-11-03 03:53:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:53:27,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:27,270 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:53:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:53:27,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:27,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2013170515, now seen corresponding path program 1 times [2022-11-03 03:53:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:27,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911689368] [2022-11-03 03:53:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:27,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:27,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911689368] [2022-11-03 03:53:27,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911689368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:27,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:27,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:53:27,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137756805] [2022-11-03 03:53:27,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:27,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:27,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:27,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:27,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:53:27,445 INFO L87 Difference]: Start difference. First operand 1069 states and 1703 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:53:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:27,738 INFO L93 Difference]: Finished difference Result 2075 states and 3361 transitions. [2022-11-03 03:53:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:27,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-03 03:53:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:27,748 INFO L225 Difference]: With dead ends: 2075 [2022-11-03 03:53:27,748 INFO L226 Difference]: Without dead ends: 1069 [2022-11-03 03:53:27,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:53:27,755 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 210 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:27,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1326 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:53:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-11-03 03:53:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1069. [2022-11-03 03:53:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5465425531914894) internal successors, (1163), 804 states have internal predecessors, (1163), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-11-03 03:53:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1671 transitions. [2022-11-03 03:53:27,849 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1671 transitions. Word has length 63 [2022-11-03 03:53:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:27,850 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1671 transitions. [2022-11-03 03:53:27,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:53:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1671 transitions. [2022-11-03 03:53:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:53:27,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:27,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:27,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:53:27,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:27,854 INFO L85 PathProgramCache]: Analyzing trace with hash 21526359, now seen corresponding path program 1 times [2022-11-03 03:53:27,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:27,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393181664] [2022-11-03 03:53:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:27,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:53:28,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393181664] [2022-11-03 03:53:28,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393181664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:28,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:28,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:53:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526453719] [2022-11-03 03:53:28,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:53:28,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:53:28,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:53:28,234 INFO L87 Difference]: Start difference. First operand 1069 states and 1671 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 03:53:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:30,429 INFO L93 Difference]: Finished difference Result 2007 states and 3144 transitions. [2022-11-03 03:53:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:53:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-11-03 03:53:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:30,443 INFO L225 Difference]: With dead ends: 2007 [2022-11-03 03:53:30,444 INFO L226 Difference]: Without dead ends: 1202 [2022-11-03 03:53:30,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:53:30,451 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 856 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:30,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1487 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 03:53:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-11-03 03:53:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1096. [2022-11-03 03:53:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 770 states have (on average 1.5389610389610389) internal successors, (1185), 826 states have internal predecessors, (1185), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-03 03:53:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1705 transitions. [2022-11-03 03:53:30,579 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1705 transitions. Word has length 65 [2022-11-03 03:53:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:30,581 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1705 transitions. [2022-11-03 03:53:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 03:53:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1705 transitions. [2022-11-03 03:53:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 03:53:30,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:30,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:30,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:53:30,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1043832779, now seen corresponding path program 1 times [2022-11-03 03:53:30,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:30,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284176655] [2022-11-03 03:53:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:30,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:53:30,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284176655] [2022-11-03 03:53:30,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284176655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:30,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:30,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:53:30,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015077865] [2022-11-03 03:53:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:30,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:53:30,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:30,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:53:30,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:53:30,916 INFO L87 Difference]: Start difference. First operand 1096 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:53:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:31,488 INFO L93 Difference]: Finished difference Result 1168 states and 1818 transitions. [2022-11-03 03:53:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:53:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-03 03:53:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:31,497 INFO L225 Difference]: With dead ends: 1168 [2022-11-03 03:53:31,498 INFO L226 Difference]: Without dead ends: 1153 [2022-11-03 03:53:31,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:53:31,502 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 608 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:31,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1279 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:53:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-11-03 03:53:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1100. [2022-11-03 03:53:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5361757105943152) internal successors, (1189), 830 states have internal predecessors, (1189), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-03 03:53:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1709 transitions. [2022-11-03 03:53:31,606 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1709 transitions. Word has length 69 [2022-11-03 03:53:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:31,607 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1709 transitions. [2022-11-03 03:53:31,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:53:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1709 transitions. [2022-11-03 03:53:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 03:53:31,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:31,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:53:31,611 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1258937169, now seen corresponding path program 1 times [2022-11-03 03:53:31,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:31,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987981514] [2022-11-03 03:53:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:31,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:53:31,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987981514] [2022-11-03 03:53:31,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987981514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:31,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:31,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:53:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425448778] [2022-11-03 03:53:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:31,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:53:31,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:31,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:53:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:53:31,934 INFO L87 Difference]: Start difference. First operand 1100 states and 1709 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:53:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:32,300 INFO L93 Difference]: Finished difference Result 1119 states and 1733 transitions. [2022-11-03 03:53:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:53:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 74 [2022-11-03 03:53:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:32,316 INFO L225 Difference]: With dead ends: 1119 [2022-11-03 03:53:32,317 INFO L226 Difference]: Without dead ends: 1104 [2022-11-03 03:53:32,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:53:32,321 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 257 mSDsluCounter, 2231 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:32,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2550 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:53:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-03 03:53:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1100. [2022-11-03 03:53:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5322997416020672) internal successors, (1186), 830 states have internal predecessors, (1186), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-03 03:53:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1706 transitions. [2022-11-03 03:53:32,448 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1706 transitions. Word has length 74 [2022-11-03 03:53:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:32,449 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1706 transitions. [2022-11-03 03:53:32,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:53:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1706 transitions. [2022-11-03 03:53:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:53:32,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:32,459 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:32,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:53:32,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:32,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1953235180, now seen corresponding path program 1 times [2022-11-03 03:53:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:32,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343786954] [2022-11-03 03:53:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:32,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:53:32,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343786954] [2022-11-03 03:53:32,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343786954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:32,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:32,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:32,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791434899] [2022-11-03 03:53:32,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:32,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:32,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:32,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:32,623 INFO L87 Difference]: Start difference. First operand 1100 states and 1706 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:32,963 INFO L93 Difference]: Finished difference Result 3229 states and 5050 transitions. [2022-11-03 03:53:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2022-11-03 03:53:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:32,980 INFO L225 Difference]: With dead ends: 3229 [2022-11-03 03:53:32,980 INFO L226 Difference]: Without dead ends: 2145 [2022-11-03 03:53:32,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:32,988 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 473 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:32,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1049 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2022-11-03 03:53:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2104. [2022-11-03 03:53:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1508 states have (on average 1.539787798408488) internal successors, (2322), 1616 states have internal predecessors, (2322), 448 states have call successors, (448), 123 states have call predecessors, (448), 147 states have return successors, (517), 420 states have call predecessors, (517), 443 states have call successors, (517) [2022-11-03 03:53:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3287 transitions. [2022-11-03 03:53:33,201 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3287 transitions. Word has length 81 [2022-11-03 03:53:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:33,203 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3287 transitions. [2022-11-03 03:53:33,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3287 transitions. [2022-11-03 03:53:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 03:53:33,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:33,207 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:33,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:53:33,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash -421157521, now seen corresponding path program 1 times [2022-11-03 03:53:33,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:33,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030120647] [2022-11-03 03:53:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:33,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:53:33,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030120647] [2022-11-03 03:53:33,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030120647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:33,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:33,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342830032] [2022-11-03 03:53:33,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:33,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:33,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:33,367 INFO L87 Difference]: Start difference. First operand 2104 states and 3287 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:33,921 INFO L93 Difference]: Finished difference Result 6240 states and 9836 transitions. [2022-11-03 03:53:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-03 03:53:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:33,962 INFO L225 Difference]: With dead ends: 6240 [2022-11-03 03:53:33,963 INFO L226 Difference]: Without dead ends: 4155 [2022-11-03 03:53:33,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:33,976 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 472 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:33,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1055 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2022-11-03 03:53:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 4113. [2022-11-03 03:53:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 2977 states have (on average 1.5418206247900572) internal successors, (4590), 3189 states have internal predecessors, (4590), 850 states have call successors, (850), 235 states have call predecessors, (850), 285 states have return successors, (1033), 782 states have call predecessors, (1033), 845 states have call successors, (1033) [2022-11-03 03:53:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 6473 transitions. [2022-11-03 03:53:34,412 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 6473 transitions. Word has length 82 [2022-11-03 03:53:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:34,413 INFO L495 AbstractCegarLoop]: Abstraction has 4113 states and 6473 transitions. [2022-11-03 03:53:34,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 6473 transitions. [2022-11-03 03:53:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 03:53:34,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:34,418 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:34,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:53:34,418 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash -171386442, now seen corresponding path program 1 times [2022-11-03 03:53:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:34,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887413945] [2022-11-03 03:53:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:53:34,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:34,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887413945] [2022-11-03 03:53:34,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887413945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:34,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:34,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:34,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672927179] [2022-11-03 03:53:34,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:34,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:34,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:34,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:34,564 INFO L87 Difference]: Start difference. First operand 4113 states and 6473 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:35,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:35,417 INFO L93 Difference]: Finished difference Result 12263 states and 19539 transitions. [2022-11-03 03:53:35,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:35,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-11-03 03:53:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:35,490 INFO L225 Difference]: With dead ends: 12263 [2022-11-03 03:53:35,490 INFO L226 Difference]: Without dead ends: 8175 [2022-11-03 03:53:35,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:35,515 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 471 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:35,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1061 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:53:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-11-03 03:53:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8132. [2022-11-03 03:53:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8132 states, 5916 states have (on average 1.5409060175794456) internal successors, (9116), 6336 states have internal predecessors, (9116), 1654 states have call successors, (1654), 459 states have call predecessors, (1654), 561 states have return successors, (2167), 1506 states have call predecessors, (2167), 1649 states have call successors, (2167) [2022-11-03 03:53:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8132 states to 8132 states and 12937 transitions. [2022-11-03 03:53:36,586 INFO L78 Accepts]: Start accepts. Automaton has 8132 states and 12937 transitions. Word has length 83 [2022-11-03 03:53:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:36,586 INFO L495 AbstractCegarLoop]: Abstraction has 8132 states and 12937 transitions. [2022-11-03 03:53:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 8132 states and 12937 transitions. [2022-11-03 03:53:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 03:53:36,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:36,591 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:36,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:53:36,592 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1018413679, now seen corresponding path program 1 times [2022-11-03 03:53:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:36,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064255123] [2022-11-03 03:53:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:36,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:53:36,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:36,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064255123] [2022-11-03 03:53:36,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064255123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:36,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:36,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:36,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610706767] [2022-11-03 03:53:36,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:36,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:36,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:36,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:36,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:36,845 INFO L87 Difference]: Start difference. First operand 8132 states and 12937 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:38,286 INFO L93 Difference]: Finished difference Result 24310 states and 39440 transitions. [2022-11-03 03:53:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 84 [2022-11-03 03:53:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:38,433 INFO L225 Difference]: With dead ends: 24310 [2022-11-03 03:53:38,433 INFO L226 Difference]: Without dead ends: 16215 [2022-11-03 03:53:38,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:38,478 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 470 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:38,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1067 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2022-11-03 03:53:40,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16171. [2022-11-03 03:53:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16171 states, 11795 states have (on average 1.538448495125053) internal successors, (18146), 12631 states have internal predecessors, (18146), 3262 states have call successors, (3262), 907 states have call predecessors, (3262), 1113 states have return successors, (4813), 2954 states have call predecessors, (4813), 3257 states have call successors, (4813) [2022-11-03 03:53:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 26221 transitions. [2022-11-03 03:53:40,368 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 26221 transitions. Word has length 84 [2022-11-03 03:53:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:40,369 INFO L495 AbstractCegarLoop]: Abstraction has 16171 states and 26221 transitions. [2022-11-03 03:53:40,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 26221 transitions. [2022-11-03 03:53:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 03:53:40,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:40,372 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:53:40,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1506450344, now seen corresponding path program 1 times [2022-11-03 03:53:40,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:40,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891958614] [2022-11-03 03:53:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:40,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:53:40,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:40,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891958614] [2022-11-03 03:53:40,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891958614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:40,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:40,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503869607] [2022-11-03 03:53:40,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:40,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:40,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:40,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:40,499 INFO L87 Difference]: Start difference. First operand 16171 states and 26221 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:41,778 INFO L93 Difference]: Finished difference Result 17221 states and 28012 transitions. [2022-11-03 03:53:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-11-03 03:53:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:41,878 INFO L225 Difference]: With dead ends: 17221 [2022-11-03 03:53:41,878 INFO L226 Difference]: Without dead ends: 17210 [2022-11-03 03:53:41,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:41,891 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 456 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:41,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1065 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17210 states. [2022-11-03 03:53:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17210 to 17167. [2022-11-03 03:53:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17167 states, 12522 states have (on average 1.537374221370388) internal successors, (19251), 13410 states have internal predecessors, (19251), 3463 states have call successors, (3463), 963 states have call predecessors, (3463), 1181 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-03 03:53:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17167 states to 17167 states and 27935 transitions. [2022-11-03 03:53:43,954 INFO L78 Accepts]: Start accepts. Automaton has 17167 states and 27935 transitions. Word has length 85 [2022-11-03 03:53:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:43,955 INFO L495 AbstractCegarLoop]: Abstraction has 17167 states and 27935 transitions. [2022-11-03 03:53:43,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:53:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17167 states and 27935 transitions. [2022-11-03 03:53:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 03:53:43,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:43,963 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:43,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:53:43,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:43,964 INFO L85 PathProgramCache]: Analyzing trace with hash -252878320, now seen corresponding path program 1 times [2022-11-03 03:53:43,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:43,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252250898] [2022-11-03 03:53:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:43,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 03:53:44,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252250898] [2022-11-03 03:53:44,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252250898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:53:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761010507] [2022-11-03 03:53:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:44,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:44,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:44,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:53:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:44,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:53:44,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:44,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761010507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:44,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:53:44,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:53:44,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008713997] [2022-11-03 03:53:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:44,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:53:44,849 INFO L87 Difference]: Start difference. First operand 17167 states and 27935 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:53:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:47,002 INFO L93 Difference]: Finished difference Result 36306 states and 60697 transitions. [2022-11-03 03:53:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:53:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2022-11-03 03:53:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:47,138 INFO L225 Difference]: With dead ends: 36306 [2022-11-03 03:53:47,139 INFO L226 Difference]: Without dead ends: 19156 [2022-11-03 03:53:47,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:53:47,226 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 213 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:47,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1221 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:53:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19156 states. [2022-11-03 03:53:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19156 to 19156. [2022-11-03 03:53:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19156 states, 14460 states have (on average 1.5887966804979252) internal successors, (22974), 15348 states have internal predecessors, (22974), 3463 states have call successors, (3463), 1014 states have call predecessors, (3463), 1232 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-03 03:53:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19156 states to 19156 states and 31658 transitions. [2022-11-03 03:53:49,048 INFO L78 Accepts]: Start accepts. Automaton has 19156 states and 31658 transitions. Word has length 128 [2022-11-03 03:53:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:49,051 INFO L495 AbstractCegarLoop]: Abstraction has 19156 states and 31658 transitions. [2022-11-03 03:53:49,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:53:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19156 states and 31658 transitions. [2022-11-03 03:53:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:53:49,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:49,061 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:49,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:49,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:53:49,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 289323624, now seen corresponding path program 1 times [2022-11-03 03:53:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:49,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86120375] [2022-11-03 03:53:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:53:51,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:51,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86120375] [2022-11-03 03:53:51,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86120375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:53:51,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988533257] [2022-11-03 03:53:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:51,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:51,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:51,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:51,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:53:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:51,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:51,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:51,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:51,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988533257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:51,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:53:51,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 03:53:51,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473697791] [2022-11-03 03:53:51,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:53:51,964 INFO L87 Difference]: Start difference. First operand 19156 states and 31658 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:53:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:53,379 INFO L93 Difference]: Finished difference Result 40284 states and 68092 transitions. [2022-11-03 03:53:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:53:53,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 133 [2022-11-03 03:53:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:53,513 INFO L225 Difference]: With dead ends: 40284 [2022-11-03 03:53:53,513 INFO L226 Difference]: Without dead ends: 21145 [2022-11-03 03:53:53,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:53:53,715 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 211 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:53,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:53:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21145 states. [2022-11-03 03:53:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21145 to 21145. [2022-11-03 03:53:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21145 states, 16398 states have (on average 1.6280643980973288) internal successors, (26697), 17286 states have internal predecessors, (26697), 3463 states have call successors, (3463), 1065 states have call predecessors, (3463), 1283 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-03 03:53:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21145 states to 21145 states and 35381 transitions. [2022-11-03 03:53:55,415 INFO L78 Accepts]: Start accepts. Automaton has 21145 states and 35381 transitions. Word has length 133 [2022-11-03 03:53:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:55,416 INFO L495 AbstractCegarLoop]: Abstraction has 21145 states and 35381 transitions. [2022-11-03 03:53:55,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:53:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 21145 states and 35381 transitions. [2022-11-03 03:53:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 03:53:55,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:55,426 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:55,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:53:55,639 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash -774046536, now seen corresponding path program 1 times [2022-11-03 03:53:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722699655] [2022-11-03 03:53:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 03:53:57,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722699655] [2022-11-03 03:53:57,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722699655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:53:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732454625] [2022-11-03 03:53:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:57,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:57,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:53:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:58,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:53:58,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:58,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732454625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:58,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:53:58,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 03:53:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477876690] [2022-11-03 03:53:58,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:58,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:58,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:53:58,088 INFO L87 Difference]: Start difference. First operand 21145 states and 35381 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:53:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:59,992 INFO L93 Difference]: Finished difference Result 44262 states and 75487 transitions. [2022-11-03 03:53:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:53:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 137 [2022-11-03 03:53:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:00,153 INFO L225 Difference]: With dead ends: 44262 [2022-11-03 03:54:00,153 INFO L226 Difference]: Without dead ends: 23134 [2022-11-03 03:54:00,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:54:00,253 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 209 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:00,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1221 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:54:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2022-11-03 03:54:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 23134. [2022-11-03 03:54:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 18336 states have (on average 1.6590314136125655) internal successors, (30420), 19224 states have internal predecessors, (30420), 3463 states have call successors, (3463), 1116 states have call predecessors, (3463), 1334 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-03 03:54:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 39104 transitions. [2022-11-03 03:54:02,074 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 39104 transitions. Word has length 137 [2022-11-03 03:54:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:02,075 INFO L495 AbstractCegarLoop]: Abstraction has 23134 states and 39104 transitions. [2022-11-03 03:54:02,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:54:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 39104 transitions. [2022-11-03 03:54:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 03:54:02,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:02,084 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:02,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:02,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:02,298 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:02,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1550730406, now seen corresponding path program 1 times [2022-11-03 03:54:02,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:02,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3452782] [2022-11-03 03:54:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 03:54:04,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:04,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3452782] [2022-11-03 03:54:04,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3452782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:04,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53539213] [2022-11-03 03:54:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:04,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:04,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:04,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:04,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:54:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:54:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:54:04,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:04,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53539213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:04,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:54:04,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 03:54:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520545107] [2022-11-03 03:54:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:04,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:04,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:54:04,716 INFO L87 Difference]: Start difference. First operand 23134 states and 39104 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:54:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:06,397 INFO L93 Difference]: Finished difference Result 48240 states and 82882 transitions. [2022-11-03 03:54:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 140 [2022-11-03 03:54:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:06,510 INFO L225 Difference]: With dead ends: 48240 [2022-11-03 03:54:06,510 INFO L226 Difference]: Without dead ends: 25123 [2022-11-03 03:54:06,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:54:06,575 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 207 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:06,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1221 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:54:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25123 states. [2022-11-03 03:54:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25123 to 25123. [2022-11-03 03:54:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25123 states, 20274 states have (on average 1.6840781296241492) internal successors, (34143), 21162 states have internal predecessors, (34143), 3463 states have call successors, (3463), 1167 states have call predecessors, (3463), 1385 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-03 03:54:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25123 states to 25123 states and 42827 transitions. [2022-11-03 03:54:08,450 INFO L78 Accepts]: Start accepts. Automaton has 25123 states and 42827 transitions. Word has length 140 [2022-11-03 03:54:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:08,451 INFO L495 AbstractCegarLoop]: Abstraction has 25123 states and 42827 transitions. [2022-11-03 03:54:08,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:54:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 25123 states and 42827 transitions. [2022-11-03 03:54:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:54:08,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:08,459 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:08,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:08,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:54:08,675 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash 148101752, now seen corresponding path program 1 times [2022-11-03 03:54:08,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:08,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393874045] [2022-11-03 03:54:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:08,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 03:54:10,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393874045] [2022-11-03 03:54:10,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393874045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390534269] [2022-11-03 03:54:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:10,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:10,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:10,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:10,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:54:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:54:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 03:54:10,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:10,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390534269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:10,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:54:10,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 03:54:10,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868330014] [2022-11-03 03:54:10,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:10,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:10,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:10,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:10,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:54:10,936 INFO L87 Difference]: Start difference. First operand 25123 states and 42827 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 03:54:12,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:12,830 INFO L93 Difference]: Finished difference Result 51840 states and 89203 transitions. [2022-11-03 03:54:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:54:12,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 142 [2022-11-03 03:54:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:12,928 INFO L225 Difference]: With dead ends: 51840 [2022-11-03 03:54:12,928 INFO L226 Difference]: Without dead ends: 26779 [2022-11-03 03:54:12,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:54:12,978 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 286 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:12,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1327 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:54:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26779 states. [2022-11-03 03:54:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26779 to 26625. [2022-11-03 03:54:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26625 states, 21348 states have (on average 1.669289863219037) internal successors, (35636), 22239 states have internal predecessors, (35636), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-11-03 03:54:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26625 states to 26625 states and 46036 transitions. [2022-11-03 03:54:14,684 INFO L78 Accepts]: Start accepts. Automaton has 26625 states and 46036 transitions. Word has length 142 [2022-11-03 03:54:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:14,685 INFO L495 AbstractCegarLoop]: Abstraction has 26625 states and 46036 transitions. [2022-11-03 03:54:14,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 03:54:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26625 states and 46036 transitions. [2022-11-03 03:54:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 03:54:14,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:14,696 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:14,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:14,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:54:14,923 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -95245040, now seen corresponding path program 1 times [2022-11-03 03:54:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072592181] [2022-11-03 03:54:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 03:54:16,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:16,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072592181] [2022-11-03 03:54:16,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072592181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:16,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290792621] [2022-11-03 03:54:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:16,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:16,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:16,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:16,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:54:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 03:54:17,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:17,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290792621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:17,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:54:17,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 03:54:17,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710200188] [2022-11-03 03:54:17,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:17,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:17,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:17,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:54:17,207 INFO L87 Difference]: Start difference. First operand 26625 states and 46036 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 03:54:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:18,447 INFO L93 Difference]: Finished difference Result 27958 states and 50408 transitions. [2022-11-03 03:54:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2022-11-03 03:54:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:18,601 INFO L225 Difference]: With dead ends: 27958 [2022-11-03 03:54:18,601 INFO L226 Difference]: Without dead ends: 27872 [2022-11-03 03:54:18,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:54:18,617 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 44 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:18,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1500 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:54:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27872 states. [2022-11-03 03:54:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27872 to 26785. [2022-11-03 03:54:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26785 states, 21508 states have (on average 1.6643109540636043) internal successors, (35796), 22399 states have internal predecessors, (35796), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-11-03 03:54:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 46196 transitions. [2022-11-03 03:54:20,362 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 46196 transitions. Word has length 145 [2022-11-03 03:54:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:20,362 INFO L495 AbstractCegarLoop]: Abstraction has 26785 states and 46196 transitions. [2022-11-03 03:54:20,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 03:54:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 46196 transitions. [2022-11-03 03:54:20,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 03:54:20,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:20,385 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:20,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:20,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:20,611 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1669981693, now seen corresponding path program 1 times [2022-11-03 03:54:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39917635] [2022-11-03 03:54:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 03:54:22,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:22,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39917635] [2022-11-03 03:54:22,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39917635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:22,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364398743] [2022-11-03 03:54:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:22,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:22,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:22,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:22,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aff8d9f-80e9-43c1-9d0d-4cd1622fea43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:54:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 03:54:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 03:54:24,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:28,006 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-03 03:54:37,385 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-03 03:54:37,866 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time...