./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh --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 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f --- 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-2329fc7 [2022-12-14 15:01:06,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:01:06,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:01:06,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:01:06,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:01:06,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:01:06,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:01:06,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:01:06,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:01:06,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:01:06,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:01:06,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:01:06,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:01:06,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:01:06,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:01:06,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:01:06,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:01:06,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:01:06,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:01:06,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:01:06,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:01:06,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:01:06,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:01:06,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:01:06,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:01:06,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:01:06,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:01:06,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:01:06,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:01:06,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:01:06,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:01:06,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:01:06,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:01:06,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:01:06,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:01:06,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:01:06,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:01:06,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:01:06,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:01:06,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:01:06,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:01:06,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:01:06,377 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:01:06,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:01:06,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:01:06,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:01:06,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:01:06,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:01:06,379 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:01:06,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:01:06,379 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:01:06,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:01:06,380 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:01:06,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:01:06,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:01:06,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:01:06,380 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:01:06,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:01:06,381 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:01:06,381 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:01:06,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:01:06,382 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:01:06,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:01:06,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:01:06,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:01:06,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:01:06,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:01:06,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:01:06,383 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:01:06,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:01:06,384 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:01:06,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:01:06,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:01:06,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:01:06,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:01:06,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:01:06,385 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:01:06,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:01:06,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:01:06,386 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:01:06,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:01:06,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:01:06,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:01:06,386 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_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f [2022-12-14 15:01:06,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:01:06,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:01:06,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:01:06,595 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:01:06,596 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:01:06,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2022-12-14 15:01:09,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:01:09,367 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:01:09,367 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2022-12-14 15:01:09,384 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/data/c495eb8a7/b8cd8774535947bc9916bb1798c2b7f4/FLAGf233a4c50 [2022-12-14 15:01:09,680 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/data/c495eb8a7/b8cd8774535947bc9916bb1798c2b7f4 [2022-12-14 15:01:09,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:01:09,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:01:09,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:01:09,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:01:09,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:01:09,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:01:09" (1/1) ... [2022-12-14 15:01:09,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52960154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:09, skipping insertion in model container [2022-12-14 15:01:09,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:01:09" (1/1) ... [2022-12-14 15:01:09,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:01:09,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:01:09,940 WARN L237 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_0921c9ea-6fc7-4424-b2a2-56c637c3db78/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2022-12-14 15:01:10,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:01:10,092 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:01:10,127 WARN L237 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_0921c9ea-6fc7-4424-b2a2-56c637c3db78/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2022-12-14 15:01:10,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:01:10,178 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:01:10,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10 WrapperNode [2022-12-14 15:01:10,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:01:10,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:01:10,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:01:10,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:01:10,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,242 INFO L138 Inliner]: procedures = 92, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1071 [2022-12-14 15:01:10,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:01:10,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:01:10,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:01:10,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:01:10,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,274 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:01:10,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:01:10,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:01:10,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:01:10,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (1/1) ... [2022-12-14 15:01:10,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:01:10,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:10,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:01:10,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:01:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:01:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 15:01:10,336 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 15:01:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 15:01:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 15:01:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 15:01:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 15:01:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 15:01:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 15:01:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 15:01:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 15:01:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 15:01:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 15:01:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 15:01:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 15:01:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 15:01:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 15:01:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 15:01:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 15:01:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 15:01:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 15:01:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 15:01:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 15:01:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 15:01:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 15:01:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 15:01:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 15:01:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 15:01:10,339 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 15:01:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 15:01:10,339 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 15:01:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 15:01:10,339 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 15:01:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 15:01:10,339 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 15:01:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 15:01:10,340 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 15:01:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 15:01:10,340 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 15:01:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:01:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 15:01:10,340 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 15:01:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 15:01:10,340 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 15:01:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 15:01:10,341 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 15:01:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:01:10,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:01:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 15:01:10,341 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 15:01:10,445 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:01:10,447 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:01:11,196 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:01:11,659 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:01:11,659 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:01:11,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:01:11 BoogieIcfgContainer [2022-12-14 15:01:11,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:01:11,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:01:11,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:01:11,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:01:11,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:01:09" (1/3) ... [2022-12-14 15:01:11,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e7ffed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:01:11, skipping insertion in model container [2022-12-14 15:01:11,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:10" (2/3) ... [2022-12-14 15:01:11,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e7ffed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:01:11, skipping insertion in model container [2022-12-14 15:01:11,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:01:11" (3/3) ... [2022-12-14 15:01:11,669 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product03.cil.c [2022-12-14 15:01:11,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:01:11,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:01:11,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:01:11,740 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;@1a657610, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:01:11,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:01:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 15:01:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 15:01:11,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:11,765 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:01:11,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1653263856, now seen corresponding path program 1 times [2022-12-14 15:01:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:11,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890267176] [2022-12-14 15:01:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:11,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:01:12,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:12,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890267176] [2022-12-14 15:01:12,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890267176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:12,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:12,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:01:12,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24115168] [2022-12-14 15:01:12,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:12,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 15:01:12,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:12,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 15:01:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 15:01:12,055 INFO L87 Difference]: Start difference. First operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-12-14 15:01:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:12,171 INFO L93 Difference]: Finished difference Result 386 states and 614 transitions. [2022-12-14 15:01:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 15:01:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 76 [2022-12-14 15:01:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:12,183 INFO L225 Difference]: With dead ends: 386 [2022-12-14 15:01:12,184 INFO L226 Difference]: Without dead ends: 364 [2022-12-14 15:01:12,186 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 [2022-12-14 15:01:12,188 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:12,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:01:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-12-14 15:01:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-12-14 15:01:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 247 states have (on average 1.591093117408907) internal successors, (393), 266 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-12-14 15:01:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2022-12-14 15:01:12,239 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 76 [2022-12-14 15:01:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:12,240 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2022-12-14 15:01:12,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-12-14 15:01:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2022-12-14 15:01:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 15:01:12,243 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:12,244 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:01:12,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:01:12,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 77805688, now seen corresponding path program 1 times [2022-12-14 15:01:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:12,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130442610] [2022-12-14 15:01:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:01:12,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:12,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130442610] [2022-12-14 15:01:12,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130442610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:12,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:12,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:01:12,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594382184] [2022-12-14 15:01:12,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:12,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:01:12,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:01:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:01:12,555 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 15:01:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:14,555 INFO L93 Difference]: Finished difference Result 1248 states and 2004 transitions. [2022-12-14 15:01:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:01:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 77 [2022-12-14 15:01:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:14,564 INFO L225 Difference]: With dead ends: 1248 [2022-12-14 15:01:14,564 INFO L226 Difference]: Without dead ends: 900 [2022-12-14 15:01:14,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:01:14,569 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1949 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 3544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:14,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 2137 Invalid, 3544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 15:01:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-12-14 15:01:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 842. [2022-12-14 15:01:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 591 states have (on average 1.6125211505922166) internal successors, (953), 626 states have internal predecessors, (953), 201 states have call successors, (201), 47 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2022-12-14 15:01:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1356 transitions. [2022-12-14 15:01:14,644 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1356 transitions. Word has length 77 [2022-12-14 15:01:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:14,644 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1356 transitions. [2022-12-14 15:01:14,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 15:01:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1356 transitions. [2022-12-14 15:01:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 15:01:14,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:14,649 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 15:01:14,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:01:14,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash -373549770, now seen corresponding path program 1 times [2022-12-14 15:01:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:14,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322439201] [2022-12-14 15:01:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:14,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:01:14,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:14,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322439201] [2022-12-14 15:01:14,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322439201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:14,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:14,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:01:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970705453] [2022-12-14 15:01:14,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:14,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:01:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:01:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:01:14,964 INFO L87 Difference]: Start difference. First operand 842 states and 1356 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 15:01:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:16,325 INFO L93 Difference]: Finished difference Result 1469 states and 2367 transitions. [2022-12-14 15:01:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:01:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-12-14 15:01:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:16,332 INFO L225 Difference]: With dead ends: 1469 [2022-12-14 15:01:16,332 INFO L226 Difference]: Without dead ends: 967 [2022-12-14 15:01:16,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:01:16,336 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1135 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:16,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1606 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 15:01:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-12-14 15:01:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 858. [2022-12-14 15:01:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 601 states have (on average 1.605657237936772) internal successors, (965), 639 states have internal predecessors, (965), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2022-12-14 15:01:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1378 transitions. [2022-12-14 15:01:16,390 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1378 transitions. Word has length 78 [2022-12-14 15:01:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:16,390 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1378 transitions. [2022-12-14 15:01:16,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 15:01:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1378 transitions. [2022-12-14 15:01:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 15:01:16,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:16,399 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 15:01:16,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:01:16,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash 763128339, now seen corresponding path program 1 times [2022-12-14 15:01:16,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:16,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425481819] [2022-12-14 15:01:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:01:16,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:16,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425481819] [2022-12-14 15:01:16,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425481819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:16,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:16,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:01:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130710444] [2022-12-14 15:01:16,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:16,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:16,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:16,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:01:16,527 INFO L87 Difference]: Start difference. First operand 858 states and 1378 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:17,510 INFO L93 Difference]: Finished difference Result 2737 states and 4461 transitions. [2022-12-14 15:01:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 82 [2022-12-14 15:01:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:17,519 INFO L225 Difference]: With dead ends: 2737 [2022-12-14 15:01:17,519 INFO L226 Difference]: Without dead ends: 1895 [2022-12-14 15:01:17,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:01:17,524 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1157 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:17,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 707 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:01:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2022-12-14 15:01:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1729. [2022-12-14 15:01:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1233 states have (on average 1.6131386861313868) internal successors, (1989), 1306 states have internal predecessors, (1989), 393 states have call successors, (393), 91 states have call predecessors, (393), 102 states have return successors, (423), 367 states have call predecessors, (423), 388 states have call successors, (423) [2022-12-14 15:01:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2805 transitions. [2022-12-14 15:01:17,610 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2805 transitions. Word has length 82 [2022-12-14 15:01:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:17,610 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2805 transitions. [2022-12-14 15:01:17,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2805 transitions. [2022-12-14 15:01:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 15:01:17,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:17,612 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 15:01:17,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:01:17,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2112960012, now seen corresponding path program 1 times [2022-12-14 15:01:17,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:17,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011958224] [2022-12-14 15:01:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:17,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:01:17,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:17,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011958224] [2022-12-14 15:01:17,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011958224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:17,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:17,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:01:17,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614016621] [2022-12-14 15:01:17,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:17,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:17,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:01:17,732 INFO L87 Difference]: Start difference. First operand 1729 states and 2805 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:18,796 INFO L93 Difference]: Finished difference Result 5284 states and 8689 transitions. [2022-12-14 15:01:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 83 [2022-12-14 15:01:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:18,810 INFO L225 Difference]: With dead ends: 5284 [2022-12-14 15:01:18,810 INFO L226 Difference]: Without dead ends: 3572 [2022-12-14 15:01:18,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:01:18,817 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1148 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:18,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 714 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:01:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2022-12-14 15:01:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 3359. [2022-12-14 15:01:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 2419 states have (on average 1.6188507647788342) internal successors, (3916), 2569 states have internal predecessors, (3916), 736 states have call successors, (736), 173 states have call predecessors, (736), 203 states have return successors, (838), 678 states have call predecessors, (838), 731 states have call successors, (838) [2022-12-14 15:01:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 5490 transitions. [2022-12-14 15:01:18,981 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 5490 transitions. Word has length 83 [2022-12-14 15:01:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:18,981 INFO L495 AbstractCegarLoop]: Abstraction has 3359 states and 5490 transitions. [2022-12-14 15:01:18,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 5490 transitions. [2022-12-14 15:01:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 15:01:18,983 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:18,983 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 15:01:18,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:01:18,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:18,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1077381771, now seen corresponding path program 1 times [2022-12-14 15:01:18,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:18,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519991622] [2022-12-14 15:01:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:18,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:01:19,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:19,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519991622] [2022-12-14 15:01:19,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519991622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:19,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:19,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:01:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855984856] [2022-12-14 15:01:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:19,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:19,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:01:19,110 INFO L87 Difference]: Start difference. First operand 3359 states and 5490 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:20,212 INFO L93 Difference]: Finished difference Result 10220 states and 17021 transitions. [2022-12-14 15:01:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2022-12-14 15:01:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:20,237 INFO L225 Difference]: With dead ends: 10220 [2022-12-14 15:01:20,237 INFO L226 Difference]: Without dead ends: 6880 [2022-12-14 15:01:20,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:01:20,248 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1135 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:20,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 725 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:01:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2022-12-14 15:01:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6564. [2022-12-14 15:01:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6564 states, 4746 states have (on average 1.619047619047619) internal successors, (7684), 5056 states have internal predecessors, (7684), 1406 states have call successors, (1406), 337 states have call predecessors, (1406), 411 states have return successors, (1744), 1284 states have call predecessors, (1744), 1401 states have call successors, (1744) [2022-12-14 15:01:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6564 states to 6564 states and 10834 transitions. [2022-12-14 15:01:20,623 INFO L78 Accepts]: Start accepts. Automaton has 6564 states and 10834 transitions. Word has length 84 [2022-12-14 15:01:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:20,624 INFO L495 AbstractCegarLoop]: Abstraction has 6564 states and 10834 transitions. [2022-12-14 15:01:20,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 6564 states and 10834 transitions. [2022-12-14 15:01:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 15:01:20,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:20,626 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 15:01:20,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:01:20,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:20,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash 960776534, now seen corresponding path program 1 times [2022-12-14 15:01:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:20,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095033332] [2022-12-14 15:01:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:20,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:01:20,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:20,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095033332] [2022-12-14 15:01:20,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095033332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:20,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:20,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:01:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544953699] [2022-12-14 15:01:20,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:20,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:20,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:01:20,778 INFO L87 Difference]: Start difference. First operand 6564 states and 10834 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:22,199 INFO L93 Difference]: Finished difference Result 19945 states and 33972 transitions. [2022-12-14 15:01:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:22,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-12-14 15:01:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:22,250 INFO L225 Difference]: With dead ends: 19945 [2022-12-14 15:01:22,250 INFO L226 Difference]: Without dead ends: 13404 [2022-12-14 15:01:22,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:01:22,271 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1122 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:22,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 734 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:01:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2022-12-14 15:01:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 12873. [2022-12-14 15:01:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 9317 states have (on average 1.616400128796823) internal successors, (15060), 9959 states have internal predecessors, (15060), 2716 states have call successors, (2716), 665 states have call predecessors, (2716), 839 states have return successors, (3854), 2466 states have call predecessors, (3854), 2711 states have call successors, (3854) [2022-12-14 15:01:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 21630 transitions. [2022-12-14 15:01:23,024 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 21630 transitions. Word has length 85 [2022-12-14 15:01:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:23,024 INFO L495 AbstractCegarLoop]: Abstraction has 12873 states and 21630 transitions. [2022-12-14 15:01:23,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 21630 transitions. [2022-12-14 15:01:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 15:01:23,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:23,027 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 15:01:23,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:01:23,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash -280821545, now seen corresponding path program 1 times [2022-12-14 15:01:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:23,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840219121] [2022-12-14 15:01:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:23,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:01:23,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:23,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840219121] [2022-12-14 15:01:23,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840219121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:23,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:23,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:01:23,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291937764] [2022-12-14 15:01:23,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:23,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:01:23,171 INFO L87 Difference]: Start difference. First operand 12873 states and 21630 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:25,554 INFO L93 Difference]: Finished difference Result 39186 states and 69580 transitions. [2022-12-14 15:01:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:25,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-12-14 15:01:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:25,651 INFO L225 Difference]: With dead ends: 39186 [2022-12-14 15:01:25,651 INFO L226 Difference]: Without dead ends: 26334 [2022-12-14 15:01:25,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:01:25,687 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1113 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:25,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 748 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:01:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26334 states. [2022-12-14 15:01:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26334 to 25266. [2022-12-14 15:01:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25266 states, 18319 states have (on average 1.61520825372564) internal successors, (29589), 19603 states have internal predecessors, (29589), 5276 states have call successors, (5276), 1319 states have call predecessors, (5276), 1670 states have return successors, (8905), 4769 states have call predecessors, (8905), 5271 states have call successors, (8905) [2022-12-14 15:01:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25266 states to 25266 states and 43770 transitions. [2022-12-14 15:01:27,289 INFO L78 Accepts]: Start accepts. Automaton has 25266 states and 43770 transitions. Word has length 86 [2022-12-14 15:01:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:27,289 INFO L495 AbstractCegarLoop]: Abstraction has 25266 states and 43770 transitions. [2022-12-14 15:01:27,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 15:01:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 25266 states and 43770 transitions. [2022-12-14 15:01:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 15:01:27,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:27,294 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, 1, 1] [2022-12-14 15:01:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:01:27,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2106645657, now seen corresponding path program 1 times [2022-12-14 15:01:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229073094] [2022-12-14 15:01:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 15:01:27,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:27,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229073094] [2022-12-14 15:01:27,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229073094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:27,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:01:27,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:01:27,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102307253] [2022-12-14 15:01:27,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:27,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:27,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:01:27,414 INFO L87 Difference]: Start difference. First operand 25266 states and 43770 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 15:01:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:28,848 INFO L93 Difference]: Finished difference Result 54175 states and 97351 transitions. [2022-12-14 15:01:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 130 [2022-12-14 15:01:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:28,956 INFO L225 Difference]: With dead ends: 54175 [2022-12-14 15:01:28,957 INFO L226 Difference]: Without dead ends: 28926 [2022-12-14 15:01:29,019 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 [2022-12-14 15:01:29,020 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 116 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:29,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1727 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:01:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28926 states. [2022-12-14 15:01:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28926 to 25506. [2022-12-14 15:01:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25506 states, 18542 states have (on average 1.610344083701866) internal successors, (29859), 19810 states have internal predecessors, (29859), 5293 states have call successors, (5293), 1319 states have call predecessors, (5293), 1670 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:01:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25506 states to 25506 states and 44074 transitions. [2022-12-14 15:01:31,000 INFO L78 Accepts]: Start accepts. Automaton has 25506 states and 44074 transitions. Word has length 130 [2022-12-14 15:01:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:31,000 INFO L495 AbstractCegarLoop]: Abstraction has 25506 states and 44074 transitions. [2022-12-14 15:01:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 15:01:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 25506 states and 44074 transitions. [2022-12-14 15:01:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 15:01:31,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:31,004 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, 1, 1, 1, 1, 1] [2022-12-14 15:01:31,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:01:31,004 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 583198089, now seen corresponding path program 1 times [2022-12-14 15:01:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:31,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531867739] [2022-12-14 15:01:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:31,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 15:01:31,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531867739] [2022-12-14 15:01:31,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531867739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846174772] [2022-12-14 15:01:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:31,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:31,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:31,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:31,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:01:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:01:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 15:01:31,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:31,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846174772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:31,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:31,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:01:31,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76828551] [2022-12-14 15:01:31,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:31,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:31,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:01:31,500 INFO L87 Difference]: Start difference. First operand 25506 states and 44074 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:32,805 INFO L93 Difference]: Finished difference Result 53491 states and 95734 transitions. [2022-12-14 15:01:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 133 [2022-12-14 15:01:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:32,909 INFO L225 Difference]: With dead ends: 53491 [2022-12-14 15:01:32,909 INFO L226 Difference]: Without dead ends: 28002 [2022-12-14 15:01:32,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:01:32,971 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 213 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:32,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1410 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:01:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28002 states. [2022-12-14 15:01:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28002 to 28002. [2022-12-14 15:01:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28002 states, 20974 states have (on average 1.646371698293125) internal successors, (34531), 22242 states have internal predecessors, (34531), 5293 states have call successors, (5293), 1383 states have call predecessors, (5293), 1734 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:01:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28002 states to 28002 states and 48746 transitions. [2022-12-14 15:01:34,357 INFO L78 Accepts]: Start accepts. Automaton has 28002 states and 48746 transitions. Word has length 133 [2022-12-14 15:01:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:34,357 INFO L495 AbstractCegarLoop]: Abstraction has 28002 states and 48746 transitions. [2022-12-14 15:01:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 28002 states and 48746 transitions. [2022-12-14 15:01:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 15:01:34,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:34,362 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, 1, 1, 1, 1, 1] [2022-12-14 15:01:34,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:01:34,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:34,563 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash 52544447, now seen corresponding path program 1 times [2022-12-14 15:01:34,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:34,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905788387] [2022-12-14 15:01:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:34,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 15:01:34,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905788387] [2022-12-14 15:01:34,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905788387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819072438] [2022-12-14 15:01:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:34,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:34,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:01:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:01:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 15:01:35,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:35,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819072438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:35,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:35,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:01:35,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669972936] [2022-12-14 15:01:35,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:35,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:35,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:01:35,007 INFO L87 Difference]: Start difference. First operand 28002 states and 48746 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, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:36,850 INFO L93 Difference]: Finished difference Result 58483 states and 105012 transitions. [2022-12-14 15:01:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:36,851 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, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 138 [2022-12-14 15:01:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:36,989 INFO L225 Difference]: With dead ends: 58483 [2022-12-14 15:01:36,989 INFO L226 Difference]: Without dead ends: 30498 [2022-12-14 15:01:37,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:01:37,087 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 211 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:37,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1410 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:01:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30498 states. [2022-12-14 15:01:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30498 to 30498. [2022-12-14 15:01:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30498 states, 23406 states have (on average 1.6749124156199264) internal successors, (39203), 24674 states have internal predecessors, (39203), 5293 states have call successors, (5293), 1447 states have call predecessors, (5293), 1798 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:01:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30498 states to 30498 states and 53418 transitions. [2022-12-14 15:01:38,704 INFO L78 Accepts]: Start accepts. Automaton has 30498 states and 53418 transitions. Word has length 138 [2022-12-14 15:01:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:38,705 INFO L495 AbstractCegarLoop]: Abstraction has 30498 states and 53418 transitions. [2022-12-14 15:01:38,705 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, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 30498 states and 53418 transitions. [2022-12-14 15:01:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 15:01:38,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:38,709 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, 1, 1, 1, 1, 1] [2022-12-14 15:01:38,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 15:01:38,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:38,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1556412993, now seen corresponding path program 1 times [2022-12-14 15:01:38,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:38,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557570666] [2022-12-14 15:01:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:38,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 15:01:39,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557570666] [2022-12-14 15:01:39,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557570666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445041173] [2022-12-14 15:01:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:39,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:39,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:39,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:01:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:01:39,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 15:01:39,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:39,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445041173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:39,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:39,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:01:39,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357340690] [2022-12-14 15:01:39,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:39,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:39,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:39,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:39,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:01:39,326 INFO L87 Difference]: Start difference. First operand 30498 states and 53418 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:40,628 INFO L93 Difference]: Finished difference Result 63475 states and 114290 transitions. [2022-12-14 15:01:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 142 [2022-12-14 15:01:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:40,723 INFO L225 Difference]: With dead ends: 63475 [2022-12-14 15:01:40,723 INFO L226 Difference]: Without dead ends: 32994 [2022-12-14 15:01:40,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:01:40,786 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 209 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:40,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1410 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:01:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32994 states. [2022-12-14 15:01:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32994 to 32994. [2022-12-14 15:01:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32994 states, 25838 states have (on average 1.6980803467760663) internal successors, (43875), 27106 states have internal predecessors, (43875), 5293 states have call successors, (5293), 1511 states have call predecessors, (5293), 1862 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:01:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32994 states to 32994 states and 58090 transitions. [2022-12-14 15:01:42,138 INFO L78 Accepts]: Start accepts. Automaton has 32994 states and 58090 transitions. Word has length 142 [2022-12-14 15:01:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:42,138 INFO L495 AbstractCegarLoop]: Abstraction has 32994 states and 58090 transitions. [2022-12-14 15:01:42,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 32994 states and 58090 transitions. [2022-12-14 15:01:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 15:01:42,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:42,143 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, 1, 1, 1, 1, 1] [2022-12-14 15:01:42,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:01:42,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:01:42,344 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash 535668201, now seen corresponding path program 1 times [2022-12-14 15:01:42,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:42,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854196452] [2022-12-14 15:01:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:42,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 15:01:43,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854196452] [2022-12-14 15:01:43,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854196452] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552911422] [2022-12-14 15:01:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:43,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:43,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:43,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:01:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:01:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:01:43,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:43,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552911422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:43,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:43,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-12-14 15:01:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425804388] [2022-12-14 15:01:43,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:43,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-12-14 15:01:43,824 INFO L87 Difference]: Start difference. First operand 32994 states and 58090 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:45,150 INFO L93 Difference]: Finished difference Result 68467 states and 123568 transitions. [2022-12-14 15:01:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 145 [2022-12-14 15:01:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:45,274 INFO L225 Difference]: With dead ends: 68467 [2022-12-14 15:01:45,274 INFO L226 Difference]: Without dead ends: 35490 [2022-12-14 15:01:45,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:01:45,358 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 207 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:45,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1410 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:01:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35490 states. [2022-12-14 15:01:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35490 to 35490. [2022-12-14 15:01:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35490 states, 28270 states have (on average 1.7172621153165901) internal successors, (48547), 29538 states have internal predecessors, (48547), 5293 states have call successors, (5293), 1575 states have call predecessors, (5293), 1926 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:01:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35490 states to 35490 states and 62762 transitions. [2022-12-14 15:01:46,770 INFO L78 Accepts]: Start accepts. Automaton has 35490 states and 62762 transitions. Word has length 145 [2022-12-14 15:01:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:46,770 INFO L495 AbstractCegarLoop]: Abstraction has 35490 states and 62762 transitions. [2022-12-14 15:01:46,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 15:01:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35490 states and 62762 transitions. [2022-12-14 15:01:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:01:46,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:46,774 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, 1, 1] [2022-12-14 15:01:46,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:01:46,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:01:46,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -770079337, now seen corresponding path program 1 times [2022-12-14 15:01:46,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:46,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606771542] [2022-12-14 15:01:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:46,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 15:01:48,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:48,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606771542] [2022-12-14 15:01:48,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606771542] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253231247] [2022-12-14 15:01:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:48,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:48,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:48,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:01:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:48,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:01:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 15:01:48,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:48,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253231247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:48,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:48,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 29 [2022-12-14 15:01:48,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378670441] [2022-12-14 15:01:48,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:48,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:01:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:01:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:01:48,582 INFO L87 Difference]: Start difference. First operand 35490 states and 62762 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-12-14 15:01:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:50,242 INFO L93 Difference]: Finished difference Result 36631 states and 66190 transitions. [2022-12-14 15:01:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 147 [2022-12-14 15:01:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:50,383 INFO L225 Difference]: With dead ends: 36631 [2022-12-14 15:01:50,384 INFO L226 Difference]: Without dead ends: 36474 [2022-12-14 15:01:50,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:01:50,407 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 556 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:50,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 900 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:01:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36474 states. [2022-12-14 15:01:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36474 to 35552. [2022-12-14 15:01:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35552 states, 28332 states have (on average 1.7156925031766201) internal successors, (48609), 29600 states have internal predecessors, (48609), 5293 states have call successors, (5293), 1575 states have call predecessors, (5293), 1926 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:01:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35552 states to 35552 states and 62824 transitions. [2022-12-14 15:01:52,006 INFO L78 Accepts]: Start accepts. Automaton has 35552 states and 62824 transitions. Word has length 147 [2022-12-14 15:01:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:52,006 INFO L495 AbstractCegarLoop]: Abstraction has 35552 states and 62824 transitions. [2022-12-14 15:01:52,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-12-14 15:01:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 35552 states and 62824 transitions. [2022-12-14 15:01:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 15:01:52,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:52,010 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:01:52,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:01:52,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:52,212 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash 887715137, now seen corresponding path program 1 times [2022-12-14 15:01:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:52,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247232560] [2022-12-14 15:01:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:52,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 15:01:53,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:53,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247232560] [2022-12-14 15:01:53,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247232560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:53,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057576880] [2022-12-14 15:01:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:53,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:53,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:53,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:01:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:01:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 15:01:53,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:53,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057576880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:53,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:53,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 29 [2022-12-14 15:01:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629017938] [2022-12-14 15:01:53,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:53,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:01:53,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:01:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:01:53,486 INFO L87 Difference]: Start difference. First operand 35552 states and 62824 transitions. Second operand has 5 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 15:01:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:54,695 INFO L93 Difference]: Finished difference Result 35779 states and 63109 transitions. [2022-12-14 15:01:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:01:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 1 states have call successors, (23) Word has length 152 [2022-12-14 15:01:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:54,793 INFO L225 Difference]: With dead ends: 35779 [2022-12-14 15:01:54,793 INFO L226 Difference]: Without dead ends: 35622 [2022-12-14 15:01:54,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:01:54,810 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 30 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:54,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2146 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:01:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35622 states. [2022-12-14 15:01:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35622 to 35552. [2022-12-14 15:01:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35552 states, 28332 states have (on average 1.7135041649018776) internal successors, (48547), 29600 states have internal predecessors, (48547), 5293 states have call successors, (5293), 1575 states have call predecessors, (5293), 1926 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:01:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35552 states to 35552 states and 62762 transitions. [2022-12-14 15:01:56,316 INFO L78 Accepts]: Start accepts. Automaton has 35552 states and 62762 transitions. Word has length 152 [2022-12-14 15:01:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:56,316 INFO L495 AbstractCegarLoop]: Abstraction has 35552 states and 62762 transitions. [2022-12-14 15:01:56,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 15:01:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 35552 states and 62762 transitions. [2022-12-14 15:01:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 15:01:56,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:56,320 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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] [2022-12-14 15:01:56,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:01:56,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:01:56,522 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash 482390879, now seen corresponding path program 1 times [2022-12-14 15:01:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:56,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527792386] [2022-12-14 15:01:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:01:57,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:57,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527792386] [2022-12-14 15:01:57,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527792386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:57,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116033380] [2022-12-14 15:01:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:57,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:57,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:57,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:01:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1828 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:01:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 15:01:57,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:57,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116033380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:57,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:57,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-12-14 15:01:57,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870398874] [2022-12-14 15:01:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:57,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:57,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-12-14 15:01:57,884 INFO L87 Difference]: Start difference. First operand 35552 states and 62762 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, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 15:01:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:59,114 INFO L93 Difference]: Finished difference Result 37172 states and 68405 transitions. [2022-12-14 15:01:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:01:59,114 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, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 159 [2022-12-14 15:01:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:59,272 INFO L225 Difference]: With dead ends: 37172 [2022-12-14 15:01:59,272 INFO L226 Difference]: Without dead ends: 37015 [2022-12-14 15:01:59,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:01:59,284 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 44 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:59,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1690 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:01:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37015 states. [2022-12-14 15:02:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37015 to 35676. [2022-12-14 15:02:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35676 states, 28456 states have (on average 1.7103949957829632) internal successors, (48671), 29724 states have internal predecessors, (48671), 5293 states have call successors, (5293), 1575 states have call predecessors, (5293), 1926 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-12-14 15:02:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35676 states to 35676 states and 62886 transitions. [2022-12-14 15:02:00,862 INFO L78 Accepts]: Start accepts. Automaton has 35676 states and 62886 transitions. Word has length 159 [2022-12-14 15:02:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:02:00,862 INFO L495 AbstractCegarLoop]: Abstraction has 35676 states and 62886 transitions. [2022-12-14 15:02:00,862 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, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 15:02:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 35676 states and 62886 transitions. [2022-12-14 15:02:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 15:02:00,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:02:00,871 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:02:00,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:02:01,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:02:01,073 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:02:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:02:01,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1236417742, now seen corresponding path program 1 times [2022-12-14 15:02:01,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:02:01,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147198875] [2022-12-14 15:02:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:02:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:02:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:02:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 15:02:02,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:02:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147198875] [2022-12-14 15:02:02,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147198875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:02:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650699153] [2022-12-14 15:02:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:02:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:02:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:02:02,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:02:02,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921c9ea-6fc7-4424-b2a2-56c637c3db78/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:02:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:02:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 15:02:02,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:02:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 15:02:03,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:02:05,071 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 15:02:11,624 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 15:02:11,902 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 15:02:19,027 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 15:02:19,304 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 15:02:25,358 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 15:02:25,447 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 15:04:55,771 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.