./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.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_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/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_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/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_1ea465fa-b073-4a53-9a25-4ae0927be13b/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 d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- 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 02:09:37,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:09:37,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:09:37,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:09:37,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:09:37,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:09:37,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:09:37,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:09:37,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:09:37,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:09:37,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:09:37,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:09:37,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:09:37,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:09:37,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:09:37,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:09:37,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:09:37,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:09:37,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:09:37,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:09:37,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:09:37,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:09:37,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:09:37,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:09:37,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:09:37,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:09:37,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:09:37,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:09:37,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:09:37,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:09:37,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:09:37,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:09:37,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:09:37,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:09:37,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:09:37,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:09:37,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:09:37,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:09:37,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:09:37,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:09:37,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:09:37,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:09:37,506 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:09:37,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:09:37,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:09:37,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:09:37,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:09:37,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:09:37,509 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:09:37,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:09:37,510 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:09:37,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:09:37,511 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:09:37,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:09:37,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:09:37,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:09:37,513 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:09:37,513 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:09:37,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:09:37,514 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:09:37,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:09:37,515 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:09:37,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:09:37,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:09:37,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:09:37,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:09:37,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:09:37,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:09:37,517 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:09:37,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:09:37,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:09:37,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:09:37,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:09:37,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:09:37,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:09:37,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:09:37,520 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:09:37,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:09:37,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:09:37,521 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:09:37,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:09:37,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:09:37,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:09:37,522 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_1ea465fa-b073-4a53-9a25-4ae0927be13b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2022-11-03 02:09:37,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:09:37,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:09:37,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:09:37,928 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:09:37,929 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:09:37,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2022-11-03 02:09:38,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/data/35e9cd7d9/94c4682b46cd4db8aea789f6a9e23680/FLAG2e81b943a [2022-11-03 02:09:38,844 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:09:38,844 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2022-11-03 02:09:38,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/data/35e9cd7d9/94c4682b46cd4db8aea789f6a9e23680/FLAG2e81b943a [2022-11-03 02:09:38,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/data/35e9cd7d9/94c4682b46cd4db8aea789f6a9e23680 [2022-11-03 02:09:38,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:09:38,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:09:38,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:09:38,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:09:38,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:09:38,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:09:38" (1/1) ... [2022-11-03 02:09:38,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb31b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:38, skipping insertion in model container [2022-11-03 02:09:38,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:09:38" (1/1) ... [2022-11-03 02:09:38,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:09:39,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:09:39,311 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_1ea465fa-b073-4a53-9a25-4ae0927be13b/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2022-11-03 02:09:39,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:09:39,738 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:09:39,764 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_1ea465fa-b073-4a53-9a25-4ae0927be13b/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2022-11-03 02:09:39,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:09:39,944 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:09:39,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39 WrapperNode [2022-11-03 02:09:39,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:09:39,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:09:39,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:09:39,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:09:39,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,083 INFO L138 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1010 [2022-11-03 02:09:40,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:09:40,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:09:40,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:09:40,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:09:40,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,202 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:09:40,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:09:40,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:09:40,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:09:40,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (1/1) ... [2022-11-03 02:09:40,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:09:40,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:40,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:09:40,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:09:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 02:09:40,316 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 02:09:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:09:40,317 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:09:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:09:40,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:09:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:09:40,318 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:09:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:09:40,318 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:09:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:09:40,318 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:09:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:09:40,319 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:09:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:09:40,319 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:09:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:09:40,319 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:09:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:09:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:09:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:09:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:09:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:09:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:09:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:09:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:09:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:09:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:09:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:09:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:09:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:09:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:09:40,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:09:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:09:40,323 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:09:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:09:40,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:09:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:09:40,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:09:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-03 02:09:40,324 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-03 02:09:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:09:40,325 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:09:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-03 02:09:40,326 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-03 02:09:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:09:40,327 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:09:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:09:40,328 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:09:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:09:40,329 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:09:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:09:40,329 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:09:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:09:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:09:40,330 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:09:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:09:40,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:09:40,331 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:09:40,331 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:09:40,331 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 02:09:40,331 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 02:09:40,538 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:09:40,541 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:09:42,008 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:09:42,879 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:09:42,879 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:09:42,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:42 BoogieIcfgContainer [2022-11-03 02:09:42,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:09:42,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:09:42,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:09:42,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:09:42,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:09:38" (1/3) ... [2022-11-03 02:09:42,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b373d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:42, skipping insertion in model container [2022-11-03 02:09:42,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:39" (2/3) ... [2022-11-03 02:09:42,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b373d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:42, skipping insertion in model container [2022-11-03 02:09:42,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:42" (3/3) ... [2022-11-03 02:09:42,897 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2022-11-03 02:09:42,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:09:42,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:09:43,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:09:43,044 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;@1d25ab39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:09:43,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:09:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2022-11-03 02:09:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:09:43,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:43,074 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:43,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash -176782080, now seen corresponding path program 1 times [2022-11-03 02:09:43,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:43,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172255017] [2022-11-03 02:09:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:09:44,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:44,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172255017] [2022-11-03 02:09:44,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172255017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498063918] [2022-11-03 02:09:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:44,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:44,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:44,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:44,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:09:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:09:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:44,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:44,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498063918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:44,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:09:44,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:09:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613214862] [2022-11-03 02:09:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:44,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:09:44,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:09:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:44,685 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:09:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:45,126 INFO L93 Difference]: Finished difference Result 1225 states and 1938 transitions. [2022-11-03 02:09:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:09:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2022-11-03 02:09:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:45,152 INFO L225 Difference]: With dead ends: 1225 [2022-11-03 02:09:45,152 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 02:09:45,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 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 02:09:45,165 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 578 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:45,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 1385 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 02:09:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2022-11-03 02:09:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 523 states have (on average 1.5468451242829828) internal successors, (809), 558 states have internal predecessors, (809), 205 states have call successors, (205), 53 states have call predecessors, (205), 52 states have return successors, (207), 197 states have call predecessors, (207), 202 states have call successors, (207) [2022-11-03 02:09:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1221 transitions. [2022-11-03 02:09:45,292 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1221 transitions. Word has length 50 [2022-11-03 02:09:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:45,293 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1221 transitions. [2022-11-03 02:09:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:09:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1221 transitions. [2022-11-03 02:09:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:09:45,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:45,297 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:45,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:45,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:09:45,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1180145387, now seen corresponding path program 1 times [2022-11-03 02:09:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:45,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734992783] [2022-11-03 02:09:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:45,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:09:45,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:45,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734992783] [2022-11-03 02:09:45,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734992783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751063874] [2022-11-03 02:09:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:45,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:45,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:09:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:09:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:46,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:46,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751063874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:46,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:09:46,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:09:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600427008] [2022-11-03 02:09:46,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:46,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:09:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:09:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:46,351 INFO L87 Difference]: Start difference. First operand 781 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:09:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:46,644 INFO L93 Difference]: Finished difference Result 1915 states and 3024 transitions. [2022-11-03 02:09:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:09:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2022-11-03 02:09:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:46,662 INFO L225 Difference]: With dead ends: 1915 [2022-11-03 02:09:46,662 INFO L226 Difference]: Without dead ends: 1146 [2022-11-03 02:09:46,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 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 02:09:46,669 INFO L413 NwaCegarLoop]: 1077 mSDtfsCounter, 633 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:46,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1615 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-11-03 02:09:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1122. [2022-11-03 02:09:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 755 states have (on average 1.5536423841059603) internal successors, (1173), 807 states have internal predecessors, (1173), 292 states have call successors, (292), 74 states have call predecessors, (292), 74 states have return successors, (299), 282 states have call predecessors, (299), 289 states have call successors, (299) [2022-11-03 02:09:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1764 transitions. [2022-11-03 02:09:46,788 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1764 transitions. Word has length 49 [2022-11-03 02:09:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:46,789 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1764 transitions. [2022-11-03 02:09:46,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:09:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1764 transitions. [2022-11-03 02:09:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:09:46,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:46,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:46,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:47,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:47,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1524168596, now seen corresponding path program 1 times [2022-11-03 02:09:47,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963339880] [2022-11-03 02:09:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:47,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:09:47,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:47,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963339880] [2022-11-03 02:09:47,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963339880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:47,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:47,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:09:47,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888521919] [2022-11-03 02:09:47,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:47,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:09:47,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:09:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:09:47,457 INFO L87 Difference]: Start difference. First operand 1122 states and 1764 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:09:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:47,863 INFO L93 Difference]: Finished difference Result 3336 states and 5296 transitions. [2022-11-03 02:09:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:09:47,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-11-03 02:09:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:47,884 INFO L225 Difference]: With dead ends: 3336 [2022-11-03 02:09:47,885 INFO L226 Difference]: Without dead ends: 2226 [2022-11-03 02:09:47,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:09:47,894 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 633 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:47,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1390 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:09:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-11-03 02:09:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2108. [2022-11-03 02:09:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1461 states have (on average 1.57015742642026) internal successors, (2294), 1542 states have internal predecessors, (2294), 515 states have call successors, (515), 130 states have call predecessors, (515), 131 states have return successors, (550), 480 states have call predecessors, (550), 511 states have call successors, (550) [2022-11-03 02:09:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3359 transitions. [2022-11-03 02:09:48,134 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3359 transitions. Word has length 50 [2022-11-03 02:09:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:48,135 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 3359 transitions. [2022-11-03 02:09:48,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:09:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3359 transitions. [2022-11-03 02:09:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 02:09:48,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:48,147 INFO L195 NwaCegarLoop]: trace histogram [3, 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 02:09:48,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:09:48,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:48,149 INFO L85 PathProgramCache]: Analyzing trace with hash -470509726, now seen corresponding path program 1 times [2022-11-03 02:09:48,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:48,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524142256] [2022-11-03 02:09:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:48,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:09:48,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:48,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524142256] [2022-11-03 02:09:48,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524142256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:48,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:48,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:09:48,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812594927] [2022-11-03 02:09:48,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:48,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:09:48,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:09:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:09:48,608 INFO L87 Difference]: Start difference. First operand 2108 states and 3359 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 02:09:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:48,989 INFO L93 Difference]: Finished difference Result 4905 states and 7770 transitions. [2022-11-03 02:09:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:09:48,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 93 [2022-11-03 02:09:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:49,011 INFO L225 Difference]: With dead ends: 4905 [2022-11-03 02:09:49,011 INFO L226 Difference]: Without dead ends: 2809 [2022-11-03 02:09:49,025 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 02:09:49,026 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 468 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:49,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1788 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-11-03 02:09:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2765. [2022-11-03 02:09:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 1899 states have (on average 1.517114270668773) internal successors, (2881), 1987 states have internal predecessors, (2881), 662 states have call successors, (662), 188 states have call predecessors, (662), 203 states have return successors, (790), 631 states have call predecessors, (790), 656 states have call successors, (790) [2022-11-03 02:09:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 4333 transitions. [2022-11-03 02:09:49,264 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 4333 transitions. Word has length 93 [2022-11-03 02:09:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:49,265 INFO L495 AbstractCegarLoop]: Abstraction has 2765 states and 4333 transitions. [2022-11-03 02:09:49,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 02:09:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 4333 transitions. [2022-11-03 02:09:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:09:49,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:49,272 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:09:49,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:09:49,273 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1707177976, now seen corresponding path program 1 times [2022-11-03 02:09:49,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:49,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586527767] [2022-11-03 02:09:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:49,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:09:49,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586527767] [2022-11-03 02:09:49,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586527767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:49,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:49,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:49,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717827676] [2022-11-03 02:09:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:49,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:49,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:49,767 INFO L87 Difference]: Start difference. First operand 2765 states and 4333 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:09:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:51,188 INFO L93 Difference]: Finished difference Result 7201 states and 11765 transitions. [2022-11-03 02:09:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:09:51,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-11-03 02:09:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:51,230 INFO L225 Difference]: With dead ends: 7201 [2022-11-03 02:09:51,230 INFO L226 Difference]: Without dead ends: 4448 [2022-11-03 02:09:51,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:09:51,258 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 706 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:51,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 3561 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:09:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-11-03 02:09:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4035. [2022-11-03 02:09:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 2777 states have (on average 1.5084623694634498) internal successors, (4189), 2916 states have internal predecessors, (4189), 955 states have call successors, (955), 279 states have call predecessors, (955), 302 states have return successors, (1236), 905 states have call predecessors, (1236), 947 states have call successors, (1236) [2022-11-03 02:09:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6380 transitions. [2022-11-03 02:09:51,759 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6380 transitions. Word has length 94 [2022-11-03 02:09:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:51,760 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6380 transitions. [2022-11-03 02:09:51,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:09:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6380 transitions. [2022-11-03 02:09:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 02:09:51,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:51,767 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:09:51,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:09:51,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1493767023, now seen corresponding path program 1 times [2022-11-03 02:09:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:51,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034402011] [2022-11-03 02:09:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:09:52,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:52,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034402011] [2022-11-03 02:09:52,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034402011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:52,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044404056] [2022-11-03 02:09:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:52,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:52,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:52,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:52,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:09:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:52,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:09:52,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:52,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044404056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:52,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:09:52,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:09:52,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28933046] [2022-11-03 02:09:52,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:52,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:52,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:09:52,767 INFO L87 Difference]: Start difference. First operand 4035 states and 6380 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 02:09:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:54,217 INFO L93 Difference]: Finished difference Result 10586 states and 17287 transitions. [2022-11-03 02:09:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-11-03 02:09:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:54,275 INFO L225 Difference]: With dead ends: 10586 [2022-11-03 02:09:54,276 INFO L226 Difference]: Without dead ends: 6563 [2022-11-03 02:09:54,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:09:54,321 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 562 mSDsluCounter, 2440 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3054 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:54,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 3054 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:09:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2022-11-03 02:09:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6332. [2022-11-03 02:09:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6332 states, 4360 states have (on average 1.4697247706422019) internal successors, (6408), 4591 states have internal predecessors, (6408), 1486 states have call successors, (1486), 459 states have call predecessors, (1486), 485 states have return successors, (1983), 1387 states have call predecessors, (1983), 1475 states have call successors, (1983) [2022-11-03 02:09:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 9877 transitions. [2022-11-03 02:09:54,971 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 9877 transitions. Word has length 95 [2022-11-03 02:09:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:54,975 INFO L495 AbstractCegarLoop]: Abstraction has 6332 states and 9877 transitions. [2022-11-03 02:09:54,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 02:09:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 9877 transitions. [2022-11-03 02:09:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:09:54,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:54,982 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:09:55,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:55,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:55,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:55,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:55,209 INFO L85 PathProgramCache]: Analyzing trace with hash -513258118, now seen corresponding path program 1 times [2022-11-03 02:09:55,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:55,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786432063] [2022-11-03 02:09:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:55,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:09:55,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:55,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786432063] [2022-11-03 02:09:55,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786432063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:55,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372469953] [2022-11-03 02:09:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:55,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:55,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:55,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:09:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:09:56,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:09:56,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:56,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372469953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:56,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:09:56,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:09:56,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792468961] [2022-11-03 02:09:56,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:56,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:09:56,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:09:56,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:56,233 INFO L87 Difference]: Start difference. First operand 6332 states and 9877 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:09:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:57,145 INFO L93 Difference]: Finished difference Result 14110 states and 22337 transitions. [2022-11-03 02:09:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:09:57,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-03 02:09:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:57,251 INFO L225 Difference]: With dead ends: 14110 [2022-11-03 02:09:57,252 INFO L226 Difference]: Without dead ends: 7790 [2022-11-03 02:09:57,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 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 02:09:57,316 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 594 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:57,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1359 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-11-03 02:09:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6225. [2022-11-03 02:09:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6225 states, 4288 states have (on average 1.4640858208955223) internal successors, (6278), 4517 states have internal predecessors, (6278), 1466 states have call successors, (1466), 450 states have call predecessors, (1466), 470 states have return successors, (1907), 1363 states have call predecessors, (1907), 1455 states have call successors, (1907) [2022-11-03 02:09:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6225 states to 6225 states and 9651 transitions. [2022-11-03 02:09:58,061 INFO L78 Accepts]: Start accepts. Automaton has 6225 states and 9651 transitions. Word has length 94 [2022-11-03 02:09:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:58,062 INFO L495 AbstractCegarLoop]: Abstraction has 6225 states and 9651 transitions. [2022-11-03 02:09:58,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:09:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6225 states and 9651 transitions. [2022-11-03 02:09:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:09:58,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:58,071 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:09:58,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:09:58,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:09:58,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1341273073, now seen corresponding path program 1 times [2022-11-03 02:09:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:58,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579556865] [2022-11-03 02:09:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:58,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:09:59,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:59,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579556865] [2022-11-03 02:09:59,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579556865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:59,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770291323] [2022-11-03 02:09:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:59,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:59,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:09:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:09:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:10:00,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:10:00,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770291323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956634334] [2022-11-03 02:10:00,575 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-03 02:10:00,576 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:10:00,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:10:00,586 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:10:00,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:10:07,297 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-03 02:10:15,474 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-11-03 02:10:15,883 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-03 02:10:18,299 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-03 02:10:18,492 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-03 02:10:18,563 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-03 02:10:18,641 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-03 02:10:22,524 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-03 02:10:23,525 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-03 02:10:23,735 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:10:58,265 WARN L234 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:05,621 WARN L234 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:14,094 WARN L234 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:32,513 WARN L234 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:38,408 WARN L234 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 622 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:46,364 WARN L234 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:52,456 WARN L234 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:00,013 WARN L234 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 511 DAG size of output: 480 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:06,906 WARN L234 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 547 DAG size of output: 487 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:13,168 WARN L234 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:19,393 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:26,878 WARN L234 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 637 DAG size of output: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:33,279 WARN L234 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [956634334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:33,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:12:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-11-03 02:12:33,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161693628] [2022-11-03 02:12:33,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:33,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 02:12:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 02:12:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:12:33,293 INFO L87 Difference]: Start difference. First operand 6225 states and 9651 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-03 02:12:39,984 WARN L234 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:12:46,221 WARN L234 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:04,332 WARN L234 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 642 DAG size of output: 613 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:10,426 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 648 DAG size of output: 619 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:50,979 INFO L93 Difference]: Finished difference Result 12589 states and 19521 transitions. [2022-11-03 02:13:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:13:50,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-11-03 02:13:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:51,021 INFO L225 Difference]: With dead ends: 12589 [2022-11-03 02:13:51,021 INFO L226 Difference]: Without dead ends: 6376 [2022-11-03 02:13:51,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 164.3s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:13:51,046 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 306 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 7778 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 4265 SdHoareTripleChecker+Invalid, 7893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 7778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:51,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 4265 Invalid, 7893 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [115 Valid, 7778 Invalid, 0 Unknown, 0 Unchecked, 42.4s Time] [2022-11-03 02:13:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2022-11-03 02:13:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 6297. [2022-11-03 02:13:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6297 states, 4338 states have (on average 1.4603503918856615) internal successors, (6335), 4566 states have internal predecessors, (6335), 1481 states have call successors, (1481), 459 states have call predecessors, (1481), 477 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2022-11-03 02:13:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6297 states to 6297 states and 9739 transitions. [2022-11-03 02:13:51,640 INFO L78 Accepts]: Start accepts. Automaton has 6297 states and 9739 transitions. Word has length 100 [2022-11-03 02:13:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:51,640 INFO L495 AbstractCegarLoop]: Abstraction has 6297 states and 9739 transitions. [2022-11-03 02:13:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-03 02:13:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6297 states and 9739 transitions. [2022-11-03 02:13:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:13:51,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:51,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 02:13:51,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:51,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:13:51,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -42572340, now seen corresponding path program 1 times [2022-11-03 02:13:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:51,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849584962] [2022-11-03 02:13:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:52,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:52,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849584962] [2022-11-03 02:13:52,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849584962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351015632] [2022-11-03 02:13:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:52,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:52,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:52,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:13:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:13:52,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:13:53,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:13:53,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351015632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:53,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845714582] [2022-11-03 02:13:53,336 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-11-03 02:13:53,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:13:53,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:13:53,338 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:13:53,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:13:57,728 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-03 02:14:07,448 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-11-03 02:14:07,461 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-03 02:14:09,464 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-03 02:14:09,705 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-03 02:14:09,777 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-03 02:14:09,848 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-03 02:14:13,415 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-03 02:14:13,981 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-03 02:14:14,115 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:14:46,722 WARN L234 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:14:53,978 WARN L234 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:02,471 WARN L234 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:20,545 WARN L234 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:26,382 WARN L234 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:34,204 WARN L234 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:40,167 WARN L234 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:47,735 WARN L234 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:53,988 WARN L234 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 634 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:01,325 WARN L234 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 637 DAG size of output: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:07,615 WARN L234 SmtUtils]: Spent 5.75s 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 02:16:15,098 WARN L234 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 640 DAG size of output: 606 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:21,517 WARN L234 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 638 DAG size of output: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:21,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [845714582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:21,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:16:21,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-11-03 02:16:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839402949] [2022-11-03 02:16:21,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:21,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:16:21,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:16:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:16:21,530 INFO L87 Difference]: Start difference. First operand 6297 states and 9739 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-03 02:16:28,381 WARN L234 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:34,609 WARN L234 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:46,280 WARN L234 SmtUtils]: Spent 5.07s 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 02:16:52,050 WARN L234 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 605 DAG size of output: 585 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:57,497 WARN L234 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 611 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:44,466 INFO L93 Difference]: Finished difference Result 12567 states and 19482 transitions. [2022-11-03 02:17:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:17:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2022-11-03 02:17:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:44,507 INFO L225 Difference]: With dead ends: 12567 [2022-11-03 02:17:44,507 INFO L226 Difference]: Without dead ends: 6366 [2022-11-03 02:17:44,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 160.8s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:17:44,537 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 156 mSDsluCounter, 5341 mSDsCounter, 0 mSdLazyCounter, 9129 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5964 SdHoareTripleChecker+Invalid, 9183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 9129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:44,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 5964 Invalid, 9183 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [54 Valid, 9129 Invalid, 0 Unknown, 0 Unchecked, 48.9s Time] [2022-11-03 02:17:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-11-03 02:17:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 6299. [2022-11-03 02:17:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 4339 states have (on average 1.460013828070984) internal successors, (6335), 4567 states have internal predecessors, (6335), 1481 states have call successors, (1481), 460 states have call predecessors, (1481), 478 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2022-11-03 02:17:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 9739 transitions. [2022-11-03 02:17:45,113 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 9739 transitions. Word has length 106 [2022-11-03 02:17:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:45,113 INFO L495 AbstractCegarLoop]: Abstraction has 6299 states and 9739 transitions. [2022-11-03 02:17:45,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-03 02:17:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 9739 transitions. [2022-11-03 02:17:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:17:45,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:45,117 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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 02:17:45,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:45,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:45,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:45,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1189956417, now seen corresponding path program 1 times [2022-11-03 02:17:45,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:45,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655445617] [2022-11-03 02:17:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:17:45,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:45,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655445617] [2022-11-03 02:17:45,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655445617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:45,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751504282] [2022-11-03 02:17:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:45,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:45,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:45,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:17:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:46,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:17:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:17:46,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:17:46,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751504282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836481316] [2022-11-03 02:17:46,732 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-11-03 02:17:46,732 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:17:46,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:17:46,733 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:17:46,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:17:50,402 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-03 02:18:00,570 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-11-03 02:18:00,768 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-03 02:18:02,728 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-03 02:18:02,918 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-03 02:18:02,990 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-03 02:18:03,062 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-03 02:18:06,367 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-03 02:18:06,961 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-03 02:18:07,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:39,596 WARN L234 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:18:46,839 WARN L234 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:18:55,326 WARN L234 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:13,738 WARN L234 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:19,645 WARN L234 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 622 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:27,631 WARN L234 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:33,979 WARN L234 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:49,193 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:55,378 WARN L234 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:02,767 WARN L234 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 637 DAG size of output: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:09,223 WARN L234 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:17,030 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 640 DAG size of output: 606 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:23,755 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:31,826 WARN L234 SmtUtils]: Spent 6.14s 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 02:20:38,302 WARN L234 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 641 DAG size of output: 606 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:38,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [836481316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:20:38,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:20:38,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-11-03 02:20:38,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240612153] [2022-11-03 02:20:38,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:20:38,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:20:38,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:20:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:20:38,314 INFO L87 Difference]: Start difference. First operand 6299 states and 9739 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-03 02:20:45,471 WARN L234 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:51,693 WARN L234 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:21:12,250 WARN L234 SmtUtils]: Spent 8.00s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:21:20,894 WARN L234 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:22:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:22,207 INFO L93 Difference]: Finished difference Result 12568 states and 19471 transitions. [2022-11-03 02:22:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:22:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2022-11-03 02:22:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:22,248 INFO L225 Difference]: With dead ends: 12568 [2022-11-03 02:22:22,248 INFO L226 Difference]: Without dead ends: 6367 [2022-11-03 02:22:22,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 190.5s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:22:22,273 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 162 mSDsluCounter, 5357 mSDsCounter, 0 mSdLazyCounter, 11120 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 5850 SdHoareTripleChecker+Invalid, 11180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:22,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 5850 Invalid, 11180 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [60 Valid, 11120 Invalid, 0 Unknown, 0 Unchecked, 63.9s Time] [2022-11-03 02:22:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2022-11-03 02:22:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6300. [2022-11-03 02:22:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 4340 states have (on average 1.4596774193548387) internal successors, (6335), 4568 states have internal predecessors, (6335), 1480 states have call successors, (1480), 461 states have call predecessors, (1480), 479 states have return successors, (1913), 1376 states have call predecessors, (1913), 1469 states have call successors, (1913) [2022-11-03 02:22:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9728 transitions. [2022-11-03 02:22:22,925 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9728 transitions. Word has length 112 [2022-11-03 02:22:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:22,927 INFO L495 AbstractCegarLoop]: Abstraction has 6300 states and 9728 transitions. [2022-11-03 02:22:22,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-03 02:22:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9728 transitions. [2022-11-03 02:22:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:22:22,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:22,938 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:22,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:23,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:22:23,148 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1095452713, now seen corresponding path program 1 times [2022-11-03 02:22:23,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:23,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796320952] [2022-11-03 02:22:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:23,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 02:22:23,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796320952] [2022-11-03 02:22:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796320952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004438561] [2022-11-03 02:22:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:23,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:23,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:23,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:23,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea465fa-b073-4a53-9a25-4ae0927be13b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:22:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:24,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:22:24,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-03 02:22:24,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004438561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:24,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:24,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2022-11-03 02:22:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256268057] [2022-11-03 02:22:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:24,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:22:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:22:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:22:24,360 INFO L87 Difference]: Start difference. First operand 6300 states and 9728 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28)