./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:04:25,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:04:25,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:04:25,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:04:25,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:04:25,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:04:25,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:04:25,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:04:25,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:04:25,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:04:25,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:04:25,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:04:25,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:04:25,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:04:25,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:04:25,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:04:25,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:04:25,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:04:25,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:04:25,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:04:25,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:04:25,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:04:25,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:04:25,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:04:25,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:04:25,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:04:25,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:04:25,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:04:25,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:04:25,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:04:25,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:04:25,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:04:25,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:04:25,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:04:25,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:04:25,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:04:25,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:04:25,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:04:25,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:04:25,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:04:25,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:04:25,246 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:04:25,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:04:25,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:04:25,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:04:25,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:04:25,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:04:25,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:04:25,290 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:04:25,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:04:25,291 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:04:25,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:04:25,291 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:04:25,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:04:25,292 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:04:25,292 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:04:25,292 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:04:25,293 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:04:25,293 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:04:25,293 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:04:25,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:04:25,294 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:04:25,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:04:25,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:04:25,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:04:25,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:04:25,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:04:25,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:04:25,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:04:25,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:04:25,298 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:04:25,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:04:25,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:04:25,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:04:25,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:04:25,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:04:25,300 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:04:25,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:04:25,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:04:25,301 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:04:25,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:04:25,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:04:25,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:04:25,302 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_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 [2022-11-03 02:04:25,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:04:25,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:04:25,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:04:25,573 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:04:25,574 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:04:25,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2022-11-03 02:04:25,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/data/60b1da87f/3d68ff90fb2b4a319b2a0e4ffd0bbba1/FLAGcb17b4c1d [2022-11-03 02:04:26,195 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:04:26,196 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2022-11-03 02:04:26,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/data/60b1da87f/3d68ff90fb2b4a319b2a0e4ffd0bbba1/FLAGcb17b4c1d [2022-11-03 02:04:26,468 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/data/60b1da87f/3d68ff90fb2b4a319b2a0e4ffd0bbba1 [2022-11-03 02:04:26,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:04:26,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:04:26,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:04:26,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:04:26,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:04:26,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:04:26" (1/1) ... [2022-11-03 02:04:26,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64dac38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:26, skipping insertion in model container [2022-11-03 02:04:26,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:04:26" (1/1) ... [2022-11-03 02:04:26,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:04:26,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:04:27,126 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2022-11-03 02:04:27,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:04:27,164 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:04:27,240 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2022-11-03 02:04:27,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:04:27,281 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:04:27,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27 WrapperNode [2022-11-03 02:04:27,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:04:27,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:04:27,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:04:27,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:04:27,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,361 INFO L138 Inliner]: procedures = 96, calls = 352, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 894 [2022-11-03 02:04:27,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:04:27,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:04:27,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:04:27,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:04:27,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:04:27,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:04:27,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:04:27,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:04:27,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (1/1) ... [2022-11-03 02:04:27,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:04:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:27,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:04:27,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:04:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 02:04:27,553 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 02:04:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:04:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:04:27,553 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:04:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 02:04:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 02:04:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:04:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:04:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-03 02:04:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-03 02:04:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:04:27,555 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:04:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:04:27,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:04:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:04:27,556 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:04:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:04:27,556 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:04:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:04:27,556 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:04:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:04:27,557 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:04:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:04:27,557 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:04:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:04:27,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:04:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:04:27,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:04:27,558 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:04:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:04:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:04:27,561 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:04:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:04:27,561 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:04:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:04:27,562 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:04:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:04:27,562 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:04:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:04:27,563 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:04:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:04:27,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:04:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:04:27,564 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:04:27,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:04:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:04:27,566 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:04:27,567 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:04:27,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:04:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:04:27,568 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:04:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:04:27,569 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:04:27,569 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 02:04:27,569 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 02:04:27,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:04:27,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:04:27,570 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:04:27,570 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:04:27,570 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 02:04:27,570 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 02:04:27,796 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:04:27,798 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:04:29,013 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:04:29,853 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:04:29,854 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 02:04:29,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:04:29 BoogieIcfgContainer [2022-11-03 02:04:29,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:04:29,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:04:29,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:04:29,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:04:29,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:04:26" (1/3) ... [2022-11-03 02:04:29,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb8a3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:04:29, skipping insertion in model container [2022-11-03 02:04:29,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:27" (2/3) ... [2022-11-03 02:04:29,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb8a3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:04:29, skipping insertion in model container [2022-11-03 02:04:29,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:04:29" (3/3) ... [2022-11-03 02:04:29,873 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2022-11-03 02:04:29,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:04:29,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:04:29,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:04:29,999 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;@221e8f26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:04:29,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:04:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2022-11-03 02:04:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:04:30,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:30,041 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:30,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash -269389944, now seen corresponding path program 1 times [2022-11-03 02:04:30,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:30,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294022546] [2022-11-03 02:04:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:30,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:04:31,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294022546] [2022-11-03 02:04:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294022546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:31,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:31,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:04:31,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961128065] [2022-11-03 02:04:31,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:31,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:31,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:04:31,113 INFO L87 Difference]: Start difference. First operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:04:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:34,915 INFO L93 Difference]: Finished difference Result 1834 states and 2976 transitions. [2022-11-03 02:04:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:04:34,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2022-11-03 02:04:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:34,943 INFO L225 Difference]: With dead ends: 1834 [2022-11-03 02:04:34,943 INFO L226 Difference]: Without dead ends: 1392 [2022-11-03 02:04:34,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:04:34,955 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 2025 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:34,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2106 Valid, 1874 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 02:04:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2022-11-03 02:04:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1279. [2022-11-03 02:04:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 916 states have (on average 1.5753275109170306) internal successors, (1443), 951 states have internal predecessors, (1443), 292 states have call successors, (292), 71 states have call predecessors, (292), 70 states have return successors, (310), 271 states have call predecessors, (310), 288 states have call successors, (310) [2022-11-03 02:04:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2045 transitions. [2022-11-03 02:04:35,166 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2045 transitions. Word has length 70 [2022-11-03 02:04:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:35,168 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 2045 transitions. [2022-11-03 02:04:35,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:04:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2045 transitions. [2022-11-03 02:04:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 02:04:35,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:35,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:35,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:04:35,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1775734748, now seen corresponding path program 1 times [2022-11-03 02:04:35,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:35,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105142547] [2022-11-03 02:04:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:04:35,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:35,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105142547] [2022-11-03 02:04:35,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105142547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:35,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:35,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:04:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767343016] [2022-11-03 02:04:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:35,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:35,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:35,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:35,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:35,654 INFO L87 Difference]: Start difference. First operand 1279 states and 2045 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:04:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:35,986 INFO L93 Difference]: Finished difference Result 3187 states and 5085 transitions. [2022-11-03 02:04:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:04:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 101 [2022-11-03 02:04:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:36,008 INFO L225 Difference]: With dead ends: 3187 [2022-11-03 02:04:36,009 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 02:04:36,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:04:36,045 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 520 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:36,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 2050 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:04:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 02:04:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1903. [2022-11-03 02:04:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1363 states have (on average 1.5414526779163609) internal successors, (2101), 1399 states have internal predecessors, (2101), 426 states have call successors, (426), 109 states have call predecessors, (426), 113 states have return successors, (487), 407 states have call predecessors, (487), 420 states have call successors, (487) [2022-11-03 02:04:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 3014 transitions. [2022-11-03 02:04:36,213 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 3014 transitions. Word has length 101 [2022-11-03 02:04:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:36,215 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 3014 transitions. [2022-11-03 02:04:36,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:04:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 3014 transitions. [2022-11-03 02:04:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:04:36,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:36,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:36,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:04:36,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1010596704, now seen corresponding path program 1 times [2022-11-03 02:04:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893915404] [2022-11-03 02:04:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:36,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:04:36,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:36,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893915404] [2022-11-03 02:04:36,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893915404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:36,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:36,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:04:36,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099066040] [2022-11-03 02:04:36,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:36,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:04:36,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:04:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:04:36,637 INFO L87 Difference]: Start difference. First operand 1903 states and 3014 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 02:04:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:39,705 INFO L93 Difference]: Finished difference Result 5618 states and 8973 transitions. [2022-11-03 02:04:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:04:39,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 102 [2022-11-03 02:04:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:39,741 INFO L225 Difference]: With dead ends: 5618 [2022-11-03 02:04:39,741 INFO L226 Difference]: Without dead ends: 3732 [2022-11-03 02:04:39,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:04:39,763 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 1308 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 3086 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 3086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:39,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 1962 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 3086 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 02:04:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2022-11-03 02:04:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3284. [2022-11-03 02:04:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2356 states have (on average 1.5509337860780985) internal successors, (3654), 2422 states have internal predecessors, (3654), 726 states have call successors, (726), 190 states have call predecessors, (726), 201 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2022-11-03 02:04:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5218 transitions. [2022-11-03 02:04:40,069 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5218 transitions. Word has length 102 [2022-11-03 02:04:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:40,071 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 5218 transitions. [2022-11-03 02:04:40,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 02:04:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5218 transitions. [2022-11-03 02:04:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:04:40,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:40,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:40,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:04:40,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash 370777201, now seen corresponding path program 1 times [2022-11-03 02:04:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:40,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967500627] [2022-11-03 02:04:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:04:40,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967500627] [2022-11-03 02:04:40,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967500627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086155893] [2022-11-03 02:04:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:40,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:40,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:40,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:04:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:04:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:04:40,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:40,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086155893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:40,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:40,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-03 02:04:40,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881023560] [2022-11-03 02:04:40,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:40,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:40,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:40,819 INFO L87 Difference]: Start difference. First operand 3284 states and 5218 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:41,290 INFO L93 Difference]: Finished difference Result 6607 states and 10671 transitions. [2022-11-03 02:04:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:04:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 106 [2022-11-03 02:04:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:41,320 INFO L225 Difference]: With dead ends: 6607 [2022-11-03 02:04:41,321 INFO L226 Difference]: Without dead ends: 3338 [2022-11-03 02:04:41,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:04:41,354 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 85 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:41,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1821 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:04:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2022-11-03 02:04:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3338. [2022-11-03 02:04:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2401 states have (on average 1.544356518117451) internal successors, (3708), 2467 states have internal predecessors, (3708), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2022-11-03 02:04:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5272 transitions. [2022-11-03 02:04:41,615 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5272 transitions. Word has length 106 [2022-11-03 02:04:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:41,616 INFO L495 AbstractCegarLoop]: Abstraction has 3338 states and 5272 transitions. [2022-11-03 02:04:41,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5272 transitions. [2022-11-03 02:04:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:04:41,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:41,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:41,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:41,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:41,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash 388528680, now seen corresponding path program 1 times [2022-11-03 02:04:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640943054] [2022-11-03 02:04:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:04:42,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640943054] [2022-11-03 02:04:42,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640943054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380350158] [2022-11-03 02:04:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:42,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:42,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:42,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:04:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:04:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:04:42,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380350158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:42,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:42,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 02:04:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474108139] [2022-11-03 02:04:42,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:42,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:04:42,562 INFO L87 Difference]: Start difference. First operand 3338 states and 5272 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:42,970 INFO L93 Difference]: Finished difference Result 6688 states and 10690 transitions. [2022-11-03 02:04:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:04:42,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2022-11-03 02:04:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:42,995 INFO L225 Difference]: With dead ends: 6688 [2022-11-03 02:04:42,995 INFO L226 Difference]: Without dead ends: 3329 [2022-11-03 02:04:43,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:43,018 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 91 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:43,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1817 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2022-11-03 02:04:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3329. [2022-11-03 02:04:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 2392 states have (on average 1.5351170568561874) internal successors, (3672), 2458 states have internal predecessors, (3672), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2022-11-03 02:04:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 5236 transitions. [2022-11-03 02:04:43,266 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 5236 transitions. Word has length 108 [2022-11-03 02:04:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:43,266 INFO L495 AbstractCegarLoop]: Abstraction has 3329 states and 5236 transitions. [2022-11-03 02:04:43,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 5236 transitions. [2022-11-03 02:04:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:04:43,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:43,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:43,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:43,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:43,487 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1365136672, now seen corresponding path program 1 times [2022-11-03 02:04:43,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428947533] [2022-11-03 02:04:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:43,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:04:43,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428947533] [2022-11-03 02:04:43,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428947533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918767033] [2022-11-03 02:04:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:43,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:43,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:43,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:04:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:44,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:04:44,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:04:44,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:44,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918767033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:44,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:44,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 02:04:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9409028] [2022-11-03 02:04:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:44,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:44,138 INFO L87 Difference]: Start difference. First operand 3329 states and 5236 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:04:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:45,473 INFO L93 Difference]: Finished difference Result 8508 states and 13836 transitions. [2022-11-03 02:04:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:04:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2022-11-03 02:04:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:45,512 INFO L225 Difference]: With dead ends: 8508 [2022-11-03 02:04:45,513 INFO L226 Difference]: Without dead ends: 5194 [2022-11-03 02:04:45,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:04:45,548 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 662 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:45,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 2168 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:04:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2022-11-03 02:04:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 5124. [2022-11-03 02:04:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 3687 states have (on average 1.4890154597233523) internal successors, (5490), 3781 states have internal predecessors, (5490), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 333 states have return successors, (1471), 1062 states have call predecessors, (1471), 1091 states have call successors, (1471) [2022-11-03 02:04:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 8064 transitions. [2022-11-03 02:04:46,031 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 8064 transitions. Word has length 109 [2022-11-03 02:04:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:46,032 INFO L495 AbstractCegarLoop]: Abstraction has 5124 states and 8064 transitions. [2022-11-03 02:04:46,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:04:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 8064 transitions. [2022-11-03 02:04:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:04:46,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:46,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:46,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:46,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:46,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 409049355, now seen corresponding path program 1 times [2022-11-03 02:04:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218186309] [2022-11-03 02:04:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:46,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:04:46,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218186309] [2022-11-03 02:04:46,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218186309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922418919] [2022-11-03 02:04:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:46,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:46,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:46,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:04:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:04:46,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:04:46,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:46,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922418919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:46,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:46,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 02:04:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886151184] [2022-11-03 02:04:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:46,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:46,912 INFO L87 Difference]: Start difference. First operand 5124 states and 8064 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:47,575 INFO L93 Difference]: Finished difference Result 10449 states and 16982 transitions. [2022-11-03 02:04:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:04:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2022-11-03 02:04:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:47,634 INFO L225 Difference]: With dead ends: 10449 [2022-11-03 02:04:47,635 INFO L226 Difference]: Without dead ends: 5340 [2022-11-03 02:04:47,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:47,671 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 2 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:47,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2581 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2022-11-03 02:04:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5234. [2022-11-03 02:04:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 3782 states have (on average 1.4767318878900053) internal successors, (5585), 3851 states have internal predecessors, (5585), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 348 states have return successors, (1542), 1102 states have call predecessors, (1542), 1091 states have call successors, (1542) [2022-11-03 02:04:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8230 transitions. [2022-11-03 02:04:48,132 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8230 transitions. Word has length 110 [2022-11-03 02:04:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:48,132 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 8230 transitions. [2022-11-03 02:04:48,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8230 transitions. [2022-11-03 02:04:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:04:48,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:48,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:48,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:48,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash -406614207, now seen corresponding path program 1 times [2022-11-03 02:04:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:48,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857362031] [2022-11-03 02:04:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:04:48,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857362031] [2022-11-03 02:04:48,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857362031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63169932] [2022-11-03 02:04:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:48,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:48,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:48,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:48,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:04:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:04:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:04:49,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63169932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:49,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:49,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-03 02:04:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130705423] [2022-11-03 02:04:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:04:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:04:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:04:49,188 INFO L87 Difference]: Start difference. First operand 5234 states and 8230 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:04:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:50,468 INFO L93 Difference]: Finished difference Result 11731 states and 18766 transitions. [2022-11-03 02:04:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:04:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-11-03 02:04:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:50,509 INFO L225 Difference]: With dead ends: 11731 [2022-11-03 02:04:50,510 INFO L226 Difference]: Without dead ends: 6512 [2022-11-03 02:04:50,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:04:50,536 INFO L413 NwaCegarLoop]: 918 mSDtfsCounter, 784 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 3860 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:50,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 3860 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:04:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2022-11-03 02:04:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 6384. [2022-11-03 02:04:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 4663 states have (on average 1.4623632854385589) internal successors, (6819), 4754 states have internal predecessors, (6819), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2022-11-03 02:04:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 10245 transitions. [2022-11-03 02:04:51,072 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 10245 transitions. Word has length 110 [2022-11-03 02:04:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:51,072 INFO L495 AbstractCegarLoop]: Abstraction has 6384 states and 10245 transitions. [2022-11-03 02:04:51,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:04:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 10245 transitions. [2022-11-03 02:04:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:04:51,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:51,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:51,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:51,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:51,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash -588387793, now seen corresponding path program 1 times [2022-11-03 02:04:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084409270] [2022-11-03 02:04:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:04:51,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084409270] [2022-11-03 02:04:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084409270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593328761] [2022-11-03 02:04:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:51,528 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:51,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:04:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:04:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:04:51,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:51,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593328761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:51,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:51,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 02:04:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624136976] [2022-11-03 02:04:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:51,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:51,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:04:51,937 INFO L87 Difference]: Start difference. First operand 6384 states and 10245 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, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:52,786 INFO L93 Difference]: Finished difference Result 13081 states and 21609 transitions. [2022-11-03 02:04:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:04:52,787 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, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 112 [2022-11-03 02:04:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:52,841 INFO L225 Difference]: With dead ends: 13081 [2022-11-03 02:04:52,841 INFO L226 Difference]: Without dead ends: 6721 [2022-11-03 02:04:52,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:04:52,903 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 19 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:52,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1777 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:04:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2022-11-03 02:04:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6643. [2022-11-03 02:04:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 4922 states have (on average 1.4713531084924827) internal successors, (7242), 5013 states have internal predecessors, (7242), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2022-11-03 02:04:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 10668 transitions. [2022-11-03 02:04:53,573 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 10668 transitions. Word has length 112 [2022-11-03 02:04:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:53,574 INFO L495 AbstractCegarLoop]: Abstraction has 6643 states and 10668 transitions. [2022-11-03 02:04:53,574 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, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 10668 transitions. [2022-11-03 02:04:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:04:53,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:53,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:53,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:53,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:04:53,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 641849861, now seen corresponding path program 1 times [2022-11-03 02:04:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994382158] [2022-11-03 02:04:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:04:54,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994382158] [2022-11-03 02:04:54,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994382158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917254471] [2022-11-03 02:04:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:54,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:54,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:54,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:04:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:04:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:04:54,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:54,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917254471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:54,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:54,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 02:04:54,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207597506] [2022-11-03 02:04:54,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:54,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:54,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:54,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:54,465 INFO L87 Difference]: Start difference. First operand 6643 states and 10668 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:04:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:56,157 INFO L93 Difference]: Finished difference Result 16700 states and 28678 transitions. [2022-11-03 02:04:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:04:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 114 [2022-11-03 02:04:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:56,235 INFO L225 Difference]: With dead ends: 16700 [2022-11-03 02:04:56,235 INFO L226 Difference]: Without dead ends: 11368 [2022-11-03 02:04:56,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:04:56,290 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 674 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:56,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 2216 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:04:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2022-11-03 02:04:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 11132. [2022-11-03 02:04:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11132 states, 8262 states have (on average 1.4663519728879206) internal successors, (12115), 8409 states have internal predecessors, (12115), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2022-11-03 02:04:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 18666 transitions. [2022-11-03 02:04:57,314 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 18666 transitions. Word has length 114 [2022-11-03 02:04:57,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:57,314 INFO L495 AbstractCegarLoop]: Abstraction has 11132 states and 18666 transitions. [2022-11-03 02:04:57,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:04:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 18666 transitions. [2022-11-03 02:04:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:04:57,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:57,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:57,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 02:04:57,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:04:57,535 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1623455249, now seen corresponding path program 1 times [2022-11-03 02:04:57,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:57,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549938297] [2022-11-03 02:04:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:04:57,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549938297] [2022-11-03 02:04:57,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549938297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203655229] [2022-11-03 02:04:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:57,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:57,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:57,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:04:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:58,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:04:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:04:58,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:58,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203655229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:58,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:58,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-03 02:04:58,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658151017] [2022-11-03 02:04:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:58,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:58,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:58,070 INFO L87 Difference]: Start difference. First operand 11132 states and 18666 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:04:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:59,264 INFO L93 Difference]: Finished difference Result 22544 states and 39469 transitions. [2022-11-03 02:04:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:04:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 114 [2022-11-03 02:04:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:59,355 INFO L225 Difference]: With dead ends: 22544 [2022-11-03 02:04:59,355 INFO L226 Difference]: Without dead ends: 11436 [2022-11-03 02:04:59,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:59,492 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 4 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:59,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1903 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11436 states. [2022-11-03 02:05:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11436 to 11178. [2022-11-03 02:05:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 8308 states have (on average 1.4534183919114108) internal successors, (12075), 8455 states have internal predecessors, (12075), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2022-11-03 02:05:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 18626 transitions. [2022-11-03 02:05:00,603 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 18626 transitions. Word has length 114 [2022-11-03 02:05:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:00,603 INFO L495 AbstractCegarLoop]: Abstraction has 11178 states and 18626 transitions. [2022-11-03 02:05:00,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:05:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 18626 transitions. [2022-11-03 02:05:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 02:05:00,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:00,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:00,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:00,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:05:00,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1865720142, now seen corresponding path program 1 times [2022-11-03 02:05:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:00,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112323499] [2022-11-03 02:05:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:01,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112323499] [2022-11-03 02:05:01,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112323499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180537121] [2022-11-03 02:05:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:01,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:01,057 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:01,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:05:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:05:01,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:01,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180537121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:01,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:01,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 02:05:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608865623] [2022-11-03 02:05:01,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:01,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:01,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:05:01,469 INFO L87 Difference]: Start difference. First operand 11178 states and 18626 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:05:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:03,473 INFO L93 Difference]: Finished difference Result 25707 states and 45200 transitions. [2022-11-03 02:05:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:03,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 115 [2022-11-03 02:05:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:03,569 INFO L225 Difference]: With dead ends: 25707 [2022-11-03 02:05:03,570 INFO L226 Difference]: Without dead ends: 15867 [2022-11-03 02:05:03,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:03,672 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 674 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:03,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 2465 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:05:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15867 states. [2022-11-03 02:05:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15867 to 15657. [2022-11-03 02:05:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15657 states, 11638 states have (on average 1.4512802887094003) internal successors, (16890), 11841 states have internal predecessors, (16890), 2898 states have call successors, (2898), 989 states have call predecessors, (2898), 1120 states have return successors, (7365), 2910 states have call predecessors, (7365), 2852 states have call successors, (7365) [2022-11-03 02:05:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 27153 transitions. [2022-11-03 02:05:05,262 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 27153 transitions. Word has length 115 [2022-11-03 02:05:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:05,262 INFO L495 AbstractCegarLoop]: Abstraction has 15657 states and 27153 transitions. [2022-11-03 02:05:05,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:05:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 27153 transitions. [2022-11-03 02:05:05,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:05:05,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:05,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:05,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-03 02:05:05,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:05:05,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1196705317, now seen corresponding path program 1 times [2022-11-03 02:05:05,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:05,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847314410] [2022-11-03 02:05:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:05,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:05,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:05,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847314410] [2022-11-03 02:05:05,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847314410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:05,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090046860] [2022-11-03 02:05:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:05,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:05,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:05,771 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:05,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:05:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:05:06,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:05:06,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:06,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090046860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:06,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:06,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 02:05:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044302497] [2022-11-03 02:05:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:06,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:06,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:06,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:05:06,200 INFO L87 Difference]: Start difference. First operand 15657 states and 27153 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:05:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:08,565 INFO L93 Difference]: Finished difference Result 33780 states and 60840 transitions. [2022-11-03 02:05:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 116 [2022-11-03 02:05:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:08,697 INFO L225 Difference]: With dead ends: 33780 [2022-11-03 02:05:08,697 INFO L226 Difference]: Without dead ends: 19482 [2022-11-03 02:05:08,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:08,881 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 692 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:08,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 2376 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:05:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19482 states. [2022-11-03 02:05:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19482 to 18874. [2022-11-03 02:05:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18874 states, 13907 states have (on average 1.4505644639390236) internal successors, (20173), 14180 states have internal predecessors, (20173), 3602 states have call successors, (3602), 1228 states have call predecessors, (3602), 1364 states have return successors, (9721), 3573 states have call predecessors, (9721), 3547 states have call successors, (9721) [2022-11-03 02:05:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18874 states to 18874 states and 33496 transitions. [2022-11-03 02:05:10,772 INFO L78 Accepts]: Start accepts. Automaton has 18874 states and 33496 transitions. Word has length 116 [2022-11-03 02:05:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:10,773 INFO L495 AbstractCegarLoop]: Abstraction has 18874 states and 33496 transitions. [2022-11-03 02:05:10,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:05:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 18874 states and 33496 transitions. [2022-11-03 02:05:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:05:10,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:10,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:10,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-03 02:05:10,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:10,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:10,988 INFO L85 PathProgramCache]: Analyzing trace with hash 463346682, now seen corresponding path program 1 times [2022-11-03 02:05:10,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:10,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117276564] [2022-11-03 02:05:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:10,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:05:11,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117276564] [2022-11-03 02:05:11,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117276564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983172754] [2022-11-03 02:05:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:11,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:11,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:11,178 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:11,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0b27e6c-5a20-4359-b9fa-e01ac74f8708/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:05:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:05:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:05:11,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:11,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983172754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:11,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252408888] [2022-11-03 02:05:11,947 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2022-11-03 02:05:11,947 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:05:11,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:05:11,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:05:11,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:05:18,593 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-03 02:05:25,589 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 578 for LOIs [2022-11-03 02:05:35,093 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 455 for LOIs [2022-11-03 02:05:37,369 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 510 for LOIs [2022-11-03 02:05:39,673 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 512 for LOIs [2022-11-03 02:05:40,016 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 509 for LOIs [2022-11-03 02:05:40,350 INFO L197 IcfgInterpreter]: Interpreting procedure existInLiftCallsInDirection with input of size 65 for LOIs [2022-11-03 02:05:40,459 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 460 for LOIs [2022-11-03 02:05:41,453 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 456 for LOIs [2022-11-03 02:05:41,527 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-03 02:05:41,595 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 548 for LOIs [2022-11-03 02:05:44,059 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 800 for LOIs [2022-11-03 02:09:50,995 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 649 for LOIs [2022-11-03 02:09:51,621 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:09:57,060 WARN L234 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 522 DAG size of output: 517 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:10:12,920 WARN L234 SmtUtils]: Spent 15.09s on a formula simplification. DAG size of input: 649 DAG size of output: 518 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:10:29,188 WARN L234 SmtUtils]: Spent 15.58s on a formula simplification. DAG size of input: 689 DAG size of output: 532 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:10:34,837 WARN L234 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 523 DAG size of output: 520 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:10:40,379 WARN L234 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 523 DAG size of output: 520 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:01,112 WARN L234 SmtUtils]: Spent 19.65s on a formula simplification. DAG size of input: 800 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:37,703 WARN L234 SmtUtils]: Spent 33.47s on a formula simplification. DAG size of input: 1179 DAG size of output: 634 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:50,530 WARN L234 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 554 DAG size of output: 551 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:56,123 WARN L234 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 554 DAG size of output: 551 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:18,500 WARN L234 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 624 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:26,055 WARN L234 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 629 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:38,861 WARN L234 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 510 DAG size of output: 477 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:47,053 WARN L234 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 512 DAG size of output: 479 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:55,659 WARN L234 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 552 DAG size of output: 487 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:04,116 WARN L234 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 620 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:11,547 WARN L234 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 620 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:19,090 WARN L234 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 622 DAG size of output: 596 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:28,984 WARN L234 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 513 DAG size of output: 481 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:36,730 WARN L234 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 626 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:44,463 WARN L234 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 624 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:52,368 WARN L234 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 630 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:14:00,435 WARN L234 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 635 DAG size of output: 604 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:14:08,326 WARN L234 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 631 DAG size of output: 604 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:14:54,153 WARN L234 SmtUtils]: Spent 7.57s on a formula simplification. DAG size of input: 645 DAG size of output: 614 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:02,549 WARN L234 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 645 DAG size of output: 614 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:53,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [252408888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:53,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:15:53,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [5, 6, 7] total 74 [2022-11-03 02:15:53,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836130618] [2022-11-03 02:15:53,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:53,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-03 02:15:53,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-03 02:15:53,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=4939, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 02:15:53,039 INFO L87 Difference]: Start difference. First operand 18874 states and 33496 transitions. Second operand has 62 states, 48 states have (on average 1.375) internal successors, (66), 41 states have internal predecessors, (66), 18 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-03 02:16:02,471 WARN L234 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 591 DAG size of output: 551 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:10,580 WARN L234 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 603 DAG size of output: 558 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:20,721 WARN L234 SmtUtils]: Spent 9.43s on a formula simplification. DAG size of input: 592 DAG size of output: 553 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:30,655 WARN L234 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 628 DAG size of output: 560 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:38,007 WARN L234 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:45,922 WARN L234 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 637 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:52,722 WARN L234 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 643 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:59,889 WARN L234 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 610 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:07,810 WARN L234 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 639 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)