./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS --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 cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- 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-8393723 [2022-11-19 07:26:05,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:26:05,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:26:05,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:26:05,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:26:05,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:26:05,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:26:05,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:26:05,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:26:05,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:26:05,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:26:05,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:26:05,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:26:05,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:26:05,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:26:05,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:26:05,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:26:05,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:26:05,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:26:05,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:26:05,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:26:05,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:26:05,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:26:05,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:26:05,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:26:05,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:26:05,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:26:05,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:26:05,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:26:05,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:26:05,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:26:05,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:26:05,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:26:05,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:26:05,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:26:05,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:26:05,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:26:05,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:26:05,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:26:05,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:26:05,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:26:05,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:26:05,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:26:05,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:26:05,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:26:05,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:26:05,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:26:05,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:26:05,508 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:26:05,508 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:26:05,508 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:26:05,509 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:26:05,510 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:26:05,510 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:26:05,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:26:05,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:26:05,511 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:26:05,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:26:05,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:26:05,512 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:26:05,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:26:05,514 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:26:05,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:26:05,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:26:05,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:26:05,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:26:05,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:26:05,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:26:05,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:26:05,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:26:05,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:26:05,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:26:05,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:26:05,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:26:05,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:05,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:26:05,521 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:26:05,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:26:05,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:26:05,522 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:26:05,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:26:05,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:26:05,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:26:05,523 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_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2022-11-19 07:26:05,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:26:05,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:26:05,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:26:05,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:26:05,981 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:26:05,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2022-11-19 07:26:06,100 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/data/c3f516632/807a0f7028b64ccaa26a572945bc9657/FLAG5560bbde7 [2022-11-19 07:26:06,972 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:26:06,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2022-11-19 07:26:07,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/data/c3f516632/807a0f7028b64ccaa26a572945bc9657/FLAG5560bbde7 [2022-11-19 07:26:07,155 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/data/c3f516632/807a0f7028b64ccaa26a572945bc9657 [2022-11-19 07:26:07,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:26:07,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:26:07,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:07,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:26:07,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:26:07,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:07" (1/1) ... [2022-11-19 07:26:07,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b770087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:07, skipping insertion in model container [2022-11-19 07:26:07,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:07" (1/1) ... [2022-11-19 07:26:07,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:26:07,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:26:08,082 WARN L234 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_59175219-0f51-4a96-8d8b-0257bcec0d4f/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2022-11-19 07:26:08,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:08,109 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:26:08,294 WARN L234 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_59175219-0f51-4a96-8d8b-0257bcec0d4f/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2022-11-19 07:26:08,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:08,335 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:26:08,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08 WrapperNode [2022-11-19 07:26:08,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:08,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:08,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:26:08,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:26:08,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,480 INFO L138 Inliner]: procedures = 95, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1156 [2022-11-19 07:26:08,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:08,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:26:08,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:26:08,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:26:08,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,568 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:26:08,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:26:08,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:26:08,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:26:08,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (1/1) ... [2022-11-19 07:26:08,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:08,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:26:08,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-19 07:26:08,773 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-19 07:26:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 07:26:08,774 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 07:26:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 07:26:08,774 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 07:26:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 07:26:08,774 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 07:26:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 07:26:08,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 07:26:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-19 07:26:08,775 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-19 07:26:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 07:26:08,775 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 07:26:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:26:08,777 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:26:08,777 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:26:08,777 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:26:08,777 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 07:26:08,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 07:26:08,778 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 07:26:08,778 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 07:26:08,778 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 07:26:08,778 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 07:26:08,778 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 07:26:08,779 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 07:26:08,779 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 07:26:08,779 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 07:26:08,779 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-19 07:26:08,779 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-19 07:26:08,780 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 07:26:08,780 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 07:26:08,780 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-19 07:26:08,781 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-19 07:26:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 07:26:08,781 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 07:26:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-19 07:26:08,782 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-19 07:26:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 07:26:08,782 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 07:26:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 07:26:08,783 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 07:26:08,783 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 07:26:08,784 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 07:26:08,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:26:08,786 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 07:26:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 07:26:08,786 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 07:26:08,788 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 07:26:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 07:26:08,788 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 07:26:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 07:26:08,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 07:26:08,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:26:08,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:26:08,791 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 07:26:08,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 07:26:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-19 07:26:08,792 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-19 07:26:09,073 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:26:09,076 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:26:10,868 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:26:11,871 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:26:11,871 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:26:11,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:11 BoogieIcfgContainer [2022-11-19 07:26:11,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:26:11,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:26:11,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:26:11,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:26:11,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:26:07" (1/3) ... [2022-11-19 07:26:11,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c409627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:11, skipping insertion in model container [2022-11-19 07:26:11,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:08" (2/3) ... [2022-11-19 07:26:11,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c409627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:11, skipping insertion in model container [2022-11-19 07:26:11,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:11" (3/3) ... [2022-11-19 07:26:11,893 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product28.cil.c [2022-11-19 07:26:11,920 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:26:11,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:26:12,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:26:12,064 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;@6395a275, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:26:12,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:26:12,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2022-11-19 07:26:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 07:26:12,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:12,100 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] [2022-11-19 07:26:12,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash -707800898, now seen corresponding path program 1 times [2022-11-19 07:26:12,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:12,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813376406] [2022-11-19 07:26:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:12,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:26:13,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:13,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813376406] [2022-11-19 07:26:13,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813376406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:13,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:13,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:26:13,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303105211] [2022-11-19 07:26:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:13,345 INFO L87 Difference]: Start difference. First operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) 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) [2022-11-19 07:26:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:14,143 INFO L93 Difference]: Finished difference Result 1223 states and 1951 transitions. [2022-11-19 07:26:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:14,147 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 [2022-11-19 07:26:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:14,176 INFO L225 Difference]: With dead ends: 1223 [2022-11-19 07:26:14,177 INFO L226 Difference]: Without dead ends: 808 [2022-11-19 07:26:14,189 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 [2022-11-19 07:26:14,194 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 617 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:14,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1356 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:26:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-19 07:26:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 770. [2022-11-19 07:26:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 529 states have (on average 1.5689981096408319) internal successors, (830), 556 states have internal predecessors, (830), 194 states have call successors, (194), 49 states have call predecessors, (194), 46 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2022-11-19 07:26:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1221 transitions. [2022-11-19 07:26:14,441 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1221 transitions. Word has length 50 [2022-11-19 07:26:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:14,442 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1221 transitions. [2022-11-19 07:26:14,443 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) [2022-11-19 07:26:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1221 transitions. [2022-11-19 07:26:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 07:26:14,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:14,455 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] [2022-11-19 07:26:14,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:26:14,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash -219053011, now seen corresponding path program 1 times [2022-11-19 07:26:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:14,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499364519] [2022-11-19 07:26:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:14,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:26:15,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499364519] [2022-11-19 07:26:15,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499364519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:15,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:15,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:26:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281893713] [2022-11-19 07:26:15,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:15,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:26:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:26:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:26:15,194 INFO L87 Difference]: Start difference. First operand 770 states and 1221 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) [2022-11-19 07:26:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:16,684 INFO L93 Difference]: Finished difference Result 2002 states and 3268 transitions. [2022-11-19 07:26:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:26:16,686 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 [2022-11-19 07:26:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:16,710 INFO L225 Difference]: With dead ends: 2002 [2022-11-19 07:26:16,710 INFO L226 Difference]: Without dead ends: 1244 [2022-11-19 07:26:16,723 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 [2022-11-19 07:26:16,726 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 673 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:16,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 3512 Invalid, 627 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:26:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-11-19 07:26:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1127. [2022-11-19 07:26:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 777 states have (on average 1.5637065637065637) internal successors, (1215), 820 states have internal predecessors, (1215), 281 states have call successors, (281), 72 states have call predecessors, (281), 68 states have return successors, (304), 257 states have call predecessors, (304), 276 states have call successors, (304) [2022-11-19 07:26:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1800 transitions. [2022-11-19 07:26:16,879 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1800 transitions. Word has length 94 [2022-11-19 07:26:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:16,883 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1800 transitions. [2022-11-19 07:26:16,884 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) [2022-11-19 07:26:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1800 transitions. [2022-11-19 07:26:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-19 07:26:16,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:16,896 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] [2022-11-19 07:26:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:26:16,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:16,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1536939791, now seen corresponding path program 1 times [2022-11-19 07:26:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:16,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218129752] [2022-11-19 07:26:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:16,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:17,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218129752] [2022-11-19 07:26:17,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218129752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:17,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911094004] [2022-11-19 07:26:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:17,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:17,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:17,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:17,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:26:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:18,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:26:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:18,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911094004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:18,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:26:18,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:26:18,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564297652] [2022-11-19 07:26:18,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:18,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:18,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:26:18,271 INFO L87 Difference]: Start difference. First operand 1127 states and 1800 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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) [2022-11-19 07:26:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:18,795 INFO L93 Difference]: Finished difference Result 3208 states and 5234 transitions. [2022-11-19 07:26:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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 93 [2022-11-19 07:26:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:18,830 INFO L225 Difference]: With dead ends: 3208 [2022-11-19 07:26:18,830 INFO L226 Difference]: Without dead ends: 2093 [2022-11-19 07:26:18,846 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 [2022-11-19 07:26:18,851 INFO L413 NwaCegarLoop]: 1079 mSDtfsCounter, 571 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:18,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1594 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:26:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-11-19 07:26:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2038. [2022-11-19 07:26:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 1416 states have (on average 1.573446327683616) internal successors, (2228), 1502 states have internal predecessors, (2228), 493 states have call successors, (493), 129 states have call predecessors, (493), 128 states have return successors, (557), 452 states have call predecessors, (557), 488 states have call successors, (557) [2022-11-19 07:26:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 3278 transitions. [2022-11-19 07:26:19,066 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 3278 transitions. Word has length 93 [2022-11-19 07:26:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:19,067 INFO L495 AbstractCegarLoop]: Abstraction has 2038 states and 3278 transitions. [2022-11-19 07:26:19,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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) [2022-11-19 07:26:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 3278 transitions. [2022-11-19 07:26:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 07:26:19,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:19,074 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] [2022-11-19 07:26:19,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:19,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:19,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1602393416, now seen corresponding path program 1 times [2022-11-19 07:26:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:19,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562920334] [2022-11-19 07:26:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:19,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:19,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:19,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562920334] [2022-11-19 07:26:19,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562920334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318263209] [2022-11-19 07:26:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:19,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:19,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:19,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:19,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:26:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:26:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:26:20,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:20,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318263209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:20,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:26:20,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:26:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120630940] [2022-11-19 07:26:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:20,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:26:20,447 INFO L87 Difference]: Start difference. First operand 2038 states and 3278 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:26:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:20,823 INFO L93 Difference]: Finished difference Result 4152 states and 6782 transitions. [2022-11-19 07:26:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:20,825 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-11-19 07:26:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:20,847 INFO L225 Difference]: With dead ends: 4152 [2022-11-19 07:26:20,848 INFO L226 Difference]: Without dead ends: 2126 [2022-11-19 07:26:20,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:26:20,865 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 33 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:20,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1204 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:26:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-11-19 07:26:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2080. [2022-11-19 07:26:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1452 states have (on average 1.5633608815426998) internal successors, (2270), 1538 states have internal predecessors, (2270), 499 states have call successors, (499), 129 states have call predecessors, (499), 128 states have return successors, (563), 458 states have call predecessors, (563), 494 states have call successors, (563) [2022-11-19 07:26:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3332 transitions. [2022-11-19 07:26:21,083 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3332 transitions. Word has length 95 [2022-11-19 07:26:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:21,084 INFO L495 AbstractCegarLoop]: Abstraction has 2080 states and 3332 transitions. [2022-11-19 07:26:21,084 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), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:26:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3332 transitions. [2022-11-19 07:26:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-19 07:26:21,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:21,089 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] [2022-11-19 07:26:21,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:21,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1203754772, now seen corresponding path program 1 times [2022-11-19 07:26:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:21,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818675968] [2022-11-19 07:26:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:21,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:21,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818675968] [2022-11-19 07:26:21,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818675968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:21,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685061132] [2022-11-19 07:26:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:21,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:21,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:21,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:21,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:26:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:26:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:22,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:22,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685061132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:22,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:26:22,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:26:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066373914] [2022-11-19 07:26:22,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:22,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:22,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:26:22,485 INFO L87 Difference]: Start difference. First operand 2080 states and 3332 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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) [2022-11-19 07:26:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:22,899 INFO L93 Difference]: Finished difference Result 5114 states and 8320 transitions. [2022-11-19 07:26:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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 93 [2022-11-19 07:26:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:22,935 INFO L225 Difference]: With dead ends: 5114 [2022-11-19 07:26:22,935 INFO L226 Difference]: Without dead ends: 3046 [2022-11-19 07:26:22,953 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 [2022-11-19 07:26:22,954 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 572 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:22,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1555 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:26:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-11-19 07:26:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2979. [2022-11-19 07:26:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2085 states have (on average 1.5688249400479617) internal successors, (3271), 2214 states have internal predecessors, (3271), 708 states have call successors, (708), 183 states have call predecessors, (708), 185 states have return successors, (813), 650 states have call predecessors, (813), 703 states have call successors, (813) [2022-11-19 07:26:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4792 transitions. [2022-11-19 07:26:23,274 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4792 transitions. Word has length 93 [2022-11-19 07:26:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:23,275 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 4792 transitions. [2022-11-19 07:26:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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) [2022-11-19 07:26:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4792 transitions. [2022-11-19 07:26:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 07:26:23,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:23,285 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] [2022-11-19 07:26:23,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:23,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:23,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash 979137355, now seen corresponding path program 1 times [2022-11-19 07:26:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:23,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969787380] [2022-11-19 07:26:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:23,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:26:23,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969787380] [2022-11-19 07:26:23,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969787380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408389017] [2022-11-19 07:26:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:23,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:23,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:23,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:26:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:26:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:26:24,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:24,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408389017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:24,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:26:24,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 07:26:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520595599] [2022-11-19 07:26:24,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:26:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:26:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:26:24,669 INFO L87 Difference]: Start difference. First operand 2979 states and 4792 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) [2022-11-19 07:26:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:26,257 INFO L93 Difference]: Finished difference Result 8000 states and 13139 transitions. [2022-11-19 07:26:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:26:26,258 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 [2022-11-19 07:26:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:26,314 INFO L225 Difference]: With dead ends: 8000 [2022-11-19 07:26:26,315 INFO L226 Difference]: Without dead ends: 5033 [2022-11-19 07:26:26,346 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 [2022-11-19 07:26:26,348 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 538 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:26,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 2892 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:26:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5033 states. [2022-11-19 07:26:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 4999. [2022-11-19 07:26:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 3485 states have (on average 1.50961262553802) internal successors, (5261), 3720 states have internal predecessors, (5261), 1187 states have call successors, (1187), 327 states have call predecessors, (1187), 326 states have return successors, (1467), 1064 states have call predecessors, (1467), 1179 states have call successors, (1467) [2022-11-19 07:26:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 7915 transitions. [2022-11-19 07:26:26,837 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 7915 transitions. Word has length 95 [2022-11-19 07:26:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:26,838 INFO L495 AbstractCegarLoop]: Abstraction has 4999 states and 7915 transitions. [2022-11-19 07:26:26,838 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) [2022-11-19 07:26:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 7915 transitions. [2022-11-19 07:26:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 07:26:26,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:26,843 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] [2022-11-19 07:26:26,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:26:27,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1123454945, now seen corresponding path program 1 times [2022-11-19 07:26:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:27,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964273965] [2022-11-19 07:26:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:26:28,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964273965] [2022-11-19 07:26:28,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964273965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821427462] [2022-11-19 07:26:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:28,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:28,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:28,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:26:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:26:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:26:28,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:28,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821427462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:28,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:26:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-11-19 07:26:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839416256] [2022-11-19 07:26:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:26:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:26:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:26:28,759 INFO L87 Difference]: Start difference. First operand 4999 states and 7915 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:26:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:29,623 INFO L93 Difference]: Finished difference Result 11148 states and 17695 transitions. [2022-11-19 07:26:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:26:29,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-19 07:26:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:29,691 INFO L225 Difference]: With dead ends: 11148 [2022-11-19 07:26:29,692 INFO L226 Difference]: Without dead ends: 6161 [2022-11-19 07:26:29,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:26:29,743 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 432 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:29,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1797 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:26:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2022-11-19 07:26:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5967. [2022-11-19 07:26:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5967 states, 4138 states have (on average 1.4693088448525857) internal successors, (6080), 4367 states have internal predecessors, (6080), 1376 states have call successors, (1376), 432 states have call predecessors, (1376), 452 states have return successors, (1763), 1273 states have call predecessors, (1763), 1365 states have call successors, (1763) [2022-11-19 07:26:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5967 states to 5967 states and 9219 transitions. [2022-11-19 07:26:30,342 INFO L78 Accepts]: Start accepts. Automaton has 5967 states and 9219 transitions. Word has length 99 [2022-11-19 07:26:30,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:30,343 INFO L495 AbstractCegarLoop]: Abstraction has 5967 states and 9219 transitions. [2022-11-19 07:26:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:26:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5967 states and 9219 transitions. [2022-11-19 07:26:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-19 07:26:30,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:30,348 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] [2022-11-19 07:26:30,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:30,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:26:30,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2012415330, now seen corresponding path program 1 times [2022-11-19 07:26:30,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:30,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836574337] [2022-11-19 07:26:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:30,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:26:31,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:31,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836574337] [2022-11-19 07:26:31,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836574337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:31,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198394416] [2022-11-19 07:26:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:31,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:31,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:31,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:26:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:26:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:26:32,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:26:33,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198394416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:33,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774685036] [2022-11-19 07:26:33,312 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-19 07:26:33,313 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:26:33,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:26:33,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:26:33,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:26:40,883 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-19 07:26:50,218 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-11-19 07:26:50,678 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-19 07:26:53,389 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-19 07:26:53,732 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-19 07:26:53,879 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-19 07:26:54,023 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-19 07:26:58,829 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-19 07:26:59,561 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-19 07:26:59,734 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:37,501 WARN L233 SmtUtils]: Spent 8.00s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:45,690 WARN L233 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:55,696 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:18,617 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:25,531 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:34,657 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 630 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:41,500 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:52,582 WARN L233 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:04,394 WARN L233 SmtUtils]: Spent 11.18s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:11,992 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:19,145 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:28,448 WARN L233 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:36,320 WARN L233 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 635 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:36,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1774685036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:36,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:36,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-11-19 07:29:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132374095] [2022-11-19 07:29:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:36,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:29:36,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:29:36,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 07:29:36,335 INFO L87 Difference]: Start difference. First operand 5967 states and 9219 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) [2022-11-19 07:29:44,626 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:52,415 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:29:59,798 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:30:06,319 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:30:18,276 WARN L233 SmtUtils]: Spent 11.15s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:30:29,926 WARN L233 SmtUtils]: Spent 11.26s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:31:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:04,702 INFO L93 Difference]: Finished difference Result 12067 states and 18648 transitions. [2022-11-19 07:31:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:31:04,703 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 [2022-11-19 07:31:04,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:04,743 INFO L225 Difference]: With dead ends: 12067 [2022-11-19 07:31:04,743 INFO L226 Difference]: Without dead ends: 6112 [2022-11-19 07:31:04,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 207.5s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:31:04,771 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 302 mSDsluCounter, 3081 mSDsCounter, 0 mSdLazyCounter, 6066 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 3680 SdHoareTripleChecker+Invalid, 6160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 6066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:04,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 3680 Invalid, 6160 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [94 Valid, 6066 Invalid, 0 Unknown, 0 Unchecked, 37.0s Time] [2022-11-19 07:31:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2022-11-19 07:31:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 6033. [2022-11-19 07:31:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 4184 states have (on average 1.465583173996176) internal successors, (6132), 4412 states have internal predecessors, (6132), 1389 states have call successors, (1389), 441 states have call predecessors, (1389), 459 states have return successors, (1777), 1285 states have call predecessors, (1777), 1378 states have call successors, (1777) [2022-11-19 07:31:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 9298 transitions. [2022-11-19 07:31:05,500 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 9298 transitions. Word has length 100 [2022-11-19 07:31:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:05,500 INFO L495 AbstractCegarLoop]: Abstraction has 6033 states and 9298 transitions. [2022-11-19 07:31:05,501 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) [2022-11-19 07:31:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 9298 transitions. [2022-11-19 07:31:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 07:31:05,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:05,506 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] [2022-11-19 07:31:05,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:05,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:05,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash -460668467, now seen corresponding path program 1 times [2022-11-19 07:31:05,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336052903] [2022-11-19 07:31:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:05,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:31:06,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336052903] [2022-11-19 07:31:06,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336052903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896798330] [2022-11-19 07:31:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:06,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:06,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:06,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:31:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:31:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:31:06,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:31:07,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896798330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:07,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730270638] [2022-11-19 07:31:07,192 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-11-19 07:31:07,192 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:07,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:07,193 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:07,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:12,374 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-19 07:31:22,540 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-11-19 07:31:22,554 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-19 07:31:25,479 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-19 07:31:25,806 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-19 07:31:25,930 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-19 07:31:26,024 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-19 07:31:31,046 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-19 07:31:31,892 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-19 07:31:32,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:37,804 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 522 DAG size of output: 517 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:31:56,879 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 521 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:12,718 WARN L233 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:20,353 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:29,276 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:48,355 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:54,692 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:03,160 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 630 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:09,657 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:19,178 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:27,228 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 634 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:36,929 WARN L233 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:45,126 WARN L233 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:54,986 WARN L233 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:03,351 WARN L233 SmtUtils]: Spent 7.60s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:03,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1730270638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:03,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:34:03,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-11-19 07:34:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705702689] [2022-11-19 07:34:03,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:34:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:34:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 07:34:03,365 INFO L87 Difference]: Start difference. First operand 6033 states and 9298 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) [2022-11-19 07:34:12,214 WARN L233 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:20,432 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:28,456 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:35,668 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:42,547 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 605 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:34:48,926 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 611 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:35:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:32,649 INFO L93 Difference]: Finished difference Result 12045 states and 18609 transitions. [2022-11-19 07:35:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:35:32,650 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 [2022-11-19 07:35:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:32,682 INFO L225 Difference]: With dead ends: 12045 [2022-11-19 07:35:32,683 INFO L226 Difference]: Without dead ends: 6102 [2022-11-19 07:35:32,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 193.5s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:35:32,708 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 178 mSDsluCounter, 4204 mSDsCounter, 0 mSdLazyCounter, 8001 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 4800 SdHoareTripleChecker+Invalid, 8047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 8001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:32,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 4800 Invalid, 8047 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 8001 Invalid, 0 Unknown, 0 Unchecked, 46.4s Time] [2022-11-19 07:35:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6102 states. [2022-11-19 07:35:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6102 to 6035. [2022-11-19 07:35:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 4185 states have (on average 1.4652329749103943) internal successors, (6132), 4413 states have internal predecessors, (6132), 1389 states have call successors, (1389), 442 states have call predecessors, (1389), 460 states have return successors, (1777), 1285 states have call predecessors, (1777), 1378 states have call successors, (1777) [2022-11-19 07:35:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 9298 transitions. [2022-11-19 07:35:33,324 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 9298 transitions. Word has length 106 [2022-11-19 07:35:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:33,325 INFO L495 AbstractCegarLoop]: Abstraction has 6035 states and 9298 transitions. [2022-11-19 07:35:33,325 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) [2022-11-19 07:35:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 9298 transitions. [2022-11-19 07:35:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:35:33,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:33,328 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] [2022-11-19 07:35:33,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 07:35:33,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:33,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash -395249426, now seen corresponding path program 1 times [2022-11-19 07:35:33,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:33,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096880129] [2022-11-19 07:35:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:33,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:35:33,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:33,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096880129] [2022-11-19 07:35:33,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096880129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:33,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206603449] [2022-11-19 07:35:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:33,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:33,918 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:33,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59175219-0f51-4a96-8d8b-0257bcec0d4f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:35:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:35:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:35:34,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:35:35,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206603449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042385042] [2022-11-19 07:35:35,036 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-11-19 07:35:35,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:35,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:35,037 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:35,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:39,235 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-19 07:35:50,568 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-11-19 07:35:50,778 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-19 07:35:52,947 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-19 07:35:53,157 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-19 07:35:53,233 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-19 07:35:53,347 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-19 07:35:57,004 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-19 07:35:57,622 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-19 07:35:57,808 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:31,582 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:39,142 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:48,103 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:07,287 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:13,499 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 622 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:21,900 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 630 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:28,488 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:44,682 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:51,254 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:59,098 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:05,854 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:15,510 WARN L233 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:23,552 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:31,561 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 643 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:38,331 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 643 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:38,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1042385042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:38,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:38:38,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-11-19 07:38:38,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697320843] [2022-11-19 07:38:38,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:38,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:38:38,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:38:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:38:38,341 INFO L87 Difference]: Start difference. First operand 6035 states and 9298 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) [2022-11-19 07:38:45,421 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:51,902 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:38:58,284 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:39:04,038 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:39:13,166 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:39:22,123 WARN L233 SmtUtils]: Spent 8.60s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)