./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur --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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- 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-38b53e6 [2022-11-26 00:46:30,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:46:30,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:46:30,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:46:30,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:46:30,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:46:30,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:46:30,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:46:30,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:46:30,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:46:30,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:46:30,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:46:30,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:46:30,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:46:30,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:46:30,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:46:30,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:46:30,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:46:30,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:46:30,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:46:30,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:46:30,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:46:30,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:46:30,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:46:30,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:46:30,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:46:30,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:46:30,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:46:30,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:46:30,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:46:30,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:46:30,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:46:30,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:46:30,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:46:30,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:46:30,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:46:30,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:46:30,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:46:30,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:46:30,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:46:30,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:46:30,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:46:30,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:46:30,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:46:30,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:46:30,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:46:30,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:46:30,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:46:30,305 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:46:30,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:46:30,305 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:46:30,305 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:46:30,307 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:46:30,307 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:46:30,308 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:46:30,308 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:46:30,308 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:46:30,308 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:46:30,308 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:46:30,309 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:46:30,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:46:30,311 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:46:30,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:46:30,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:46:30,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:46:30,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:46:30,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:46:30,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:46:30,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:46:30,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:46:30,313 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:46:30,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:46:30,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:46:30,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:46:30,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:46:30,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:46:30,314 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:46:30,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:46:30,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:46:30,315 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:46:30,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:46:30,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:46:30,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:46:30,316 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_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2022-11-26 00:46:30,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:46:30,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:46:30,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:46:30,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:46:30,737 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:46:30,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2022-11-26 00:46:34,364 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:46:34,883 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:46:34,884 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2022-11-26 00:46:34,919 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/data/bdd5a1628/a7d8d2a8c8b84d0aa6384f5c8bef8dc6/FLAG25771eaa5 [2022-11-26 00:46:34,937 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/data/bdd5a1628/a7d8d2a8c8b84d0aa6384f5c8bef8dc6 [2022-11-26 00:46:34,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:46:34,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:46:34,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:46:34,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:46:34,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:46:34,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:46:34" (1/1) ... [2022-11-26 00:46:34,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716bd0d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:34, skipping insertion in model container [2022-11-26 00:46:34,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:46:34" (1/1) ... [2022-11-26 00:46:34,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:46:35,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:46:35,643 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2022-11-26 00:46:35,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:46:35,785 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:46:35,886 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2022-11-26 00:46:35,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:46:35,948 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:46:35,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35 WrapperNode [2022-11-26 00:46:35,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:46:35,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:46:35,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:46:35,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:46:35,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,110 INFO L138 Inliner]: procedures = 92, calls = 337, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1060 [2022-11-26 00:46:36,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:46:36,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:46:36,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:46:36,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:46:36,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:46:36,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:46:36,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:46:36,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:46:36,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (1/1) ... [2022-11-26 00:46:36,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:46:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:36,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:46:36,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:46:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-26 00:46:36,388 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-26 00:46:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:46:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:46:36,388 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:46:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:46:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:46:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:46:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:46:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:46:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:46:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:46:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:46:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:46:36,391 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:46:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:46:36,391 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:46:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-26 00:46:36,392 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-26 00:46:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 00:46:36,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 00:46:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:46:36,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:46:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:46:36,395 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:46:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:46:36,397 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:46:36,397 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:46:36,398 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:46:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:46:36,400 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:46:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:46:36,401 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:46:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:46:36,402 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:46:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:46:36,402 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:46:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:46:36,403 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:46:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-26 00:46:36,403 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-26 00:46:36,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:46:36,404 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:46:36,404 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:46:36,405 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:46:36,405 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:46:36,406 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:46:36,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:46:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:46:36,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:46:36,408 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:46:36,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:46:36,680 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:46:36,683 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:46:38,425 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:46:39,421 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:46:39,422 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:46:39,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:46:39 BoogieIcfgContainer [2022-11-26 00:46:39,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:46:39,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:46:39,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:46:39,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:46:39,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:46:34" (1/3) ... [2022-11-26 00:46:39,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd7e9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:46:39, skipping insertion in model container [2022-11-26 00:46:39,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:35" (2/3) ... [2022-11-26 00:46:39,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd7e9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:46:39, skipping insertion in model container [2022-11-26 00:46:39,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:46:39" (3/3) ... [2022-11-26 00:46:39,438 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2022-11-26 00:46:39,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:46:39,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:46:39,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:46:39,547 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;@2f16d3fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:46:39,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:46:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 375 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-26 00:46:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:46:39,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:39,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:39,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:39,587 INFO L85 PathProgramCache]: Analyzing trace with hash 532773280, now seen corresponding path program 1 times [2022-11-26 00:46:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:39,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079287540] [2022-11-26 00:46:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:39,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:46:40,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079287540] [2022-11-26 00:46:40,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079287540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:40,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:40,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:46:40,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337853048] [2022-11-26 00:46:40,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:40,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:46:40,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:46:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:46:40,362 INFO L87 Difference]: Start difference. First operand has 375 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-26 00:46:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:40,580 INFO L93 Difference]: Finished difference Result 393 states and 623 transitions. [2022-11-26 00:46:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:46:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-11-26 00:46:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:40,603 INFO L225 Difference]: With dead ends: 393 [2022-11-26 00:46:40,604 INFO L226 Difference]: Without dead ends: 371 [2022-11-26 00:46:40,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:46:40,612 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:40,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 556 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:46:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-26 00:46:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-26 00:46:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 250 states have (on average 1.584) internal successors, (396), 269 states have internal predecessors, (396), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-26 00:46:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 585 transitions. [2022-11-26 00:46:40,743 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 585 transitions. Word has length 87 [2022-11-26 00:46:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:40,749 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 585 transitions. [2022-11-26 00:46:40,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-26 00:46:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 585 transitions. [2022-11-26 00:46:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:46:40,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:40,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:40,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:46:40,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1092938559, now seen corresponding path program 1 times [2022-11-26 00:46:40,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:40,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144642252] [2022-11-26 00:46:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:40,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:46:41,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:41,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144642252] [2022-11-26 00:46:41,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144642252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:41,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:41,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:46:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918427257] [2022-11-26 00:46:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:41,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:46:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:46:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:46:41,868 INFO L87 Difference]: Start difference. First operand 371 states and 585 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-26 00:46:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:46,090 INFO L93 Difference]: Finished difference Result 1255 states and 2013 transitions. [2022-11-26 00:46:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:46:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 88 [2022-11-26 00:46:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:46,112 INFO L225 Difference]: With dead ends: 1255 [2022-11-26 00:46:46,112 INFO L226 Difference]: Without dead ends: 907 [2022-11-26 00:46:46,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:46:46,120 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1956 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:46,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2022 Valid, 2141 Invalid, 3595 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [586 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 00:46:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-11-26 00:46:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 849. [2022-11-26 00:46:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 594 states have (on average 1.6094276094276094) internal successors, (956), 629 states have internal predecessors, (956), 204 states have call successors, (204), 48 states have call predecessors, (204), 50 states have return successors, (205), 196 states have call predecessors, (205), 199 states have call successors, (205) [2022-11-26 00:46:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1365 transitions. [2022-11-26 00:46:46,259 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1365 transitions. Word has length 88 [2022-11-26 00:46:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:46,260 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1365 transitions. [2022-11-26 00:46:46,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-26 00:46:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1365 transitions. [2022-11-26 00:46:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-26 00:46:46,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:46,267 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] [2022-11-26 00:46:46,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:46:46,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash -786635683, now seen corresponding path program 1 times [2022-11-26 00:46:46,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:46,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362477933] [2022-11-26 00:46:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:46,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:46:46,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362477933] [2022-11-26 00:46:46,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362477933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:46,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:46,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:46:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254050637] [2022-11-26 00:46:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:46,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:46:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:46,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:46:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:46:46,906 INFO L87 Difference]: Start difference. First operand 849 states and 1365 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:46:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:49,943 INFO L93 Difference]: Finished difference Result 1476 states and 2376 transitions. [2022-11-26 00:46:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:46:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-26 00:46:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:49,952 INFO L225 Difference]: With dead ends: 1476 [2022-11-26 00:46:49,953 INFO L226 Difference]: Without dead ends: 974 [2022-11-26 00:46:49,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:46:49,958 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1142 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:49,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 1608 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-26 00:46:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-11-26 00:46:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 865. [2022-11-26 00:46:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 604 states have (on average 1.6026490066225165) internal successors, (968), 642 states have internal predecessors, (968), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-11-26 00:46:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1387 transitions. [2022-11-26 00:46:50,052 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1387 transitions. Word has length 89 [2022-11-26 00:46:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:50,053 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1387 transitions. [2022-11-26 00:46:50,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:46:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1387 transitions. [2022-11-26 00:46:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-26 00:46:50,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:50,057 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] [2022-11-26 00:46:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:46:50,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1603519150, now seen corresponding path program 1 times [2022-11-26 00:46:50,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133461235] [2022-11-26 00:46:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:46:50,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:50,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133461235] [2022-11-26 00:46:50,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133461235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:50,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:50,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:46:50,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659803886] [2022-11-26 00:46:50,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:50,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:46:50,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:46:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:46:50,435 INFO L87 Difference]: Start difference. First operand 865 states and 1387 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:46:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:51,161 INFO L93 Difference]: Finished difference Result 936 states and 1499 transitions. [2022-11-26 00:46:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:46:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2022-11-26 00:46:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:51,171 INFO L225 Difference]: With dead ends: 936 [2022-11-26 00:46:51,172 INFO L226 Difference]: Without dead ends: 921 [2022-11-26 00:46:51,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:46:51,175 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 677 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:51,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1464 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:46:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-26 00:46:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 869. [2022-11-26 00:46:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 608 states have (on average 1.5986842105263157) internal successors, (972), 646 states have internal predecessors, (972), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-11-26 00:46:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1391 transitions. [2022-11-26 00:46:51,259 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1391 transitions. Word has length 93 [2022-11-26 00:46:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:51,260 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1391 transitions. [2022-11-26 00:46:51,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:46:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1391 transitions. [2022-11-26 00:46:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 00:46:51,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:51,265 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] [2022-11-26 00:46:51,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:46:51,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash -270144010, now seen corresponding path program 1 times [2022-11-26 00:46:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:51,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020962135] [2022-11-26 00:46:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:46:51,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020962135] [2022-11-26 00:46:51,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020962135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:51,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:51,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:46:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603364046] [2022-11-26 00:46:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:46:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:46:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:46:51,945 INFO L87 Difference]: Start difference. First operand 869 states and 1391 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-26 00:46:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:52,193 INFO L93 Difference]: Finished difference Result 888 states and 1415 transitions. [2022-11-26 00:46:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:46:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2022-11-26 00:46:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:52,202 INFO L225 Difference]: With dead ends: 888 [2022-11-26 00:46:52,202 INFO L226 Difference]: Without dead ends: 873 [2022-11-26 00:46:52,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:46:52,205 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 41 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:52,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2724 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:46:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-26 00:46:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 869. [2022-11-26 00:46:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 608 states have (on average 1.5953947368421053) internal successors, (970), 646 states have internal predecessors, (970), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-11-26 00:46:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1389 transitions. [2022-11-26 00:46:52,286 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1389 transitions. Word has length 98 [2022-11-26 00:46:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:52,287 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1389 transitions. [2022-11-26 00:46:52,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-26 00:46:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1389 transitions. [2022-11-26 00:46:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-26 00:46:52,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:52,291 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] [2022-11-26 00:46:52,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:46:52,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1025183326, now seen corresponding path program 1 times [2022-11-26 00:46:52,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:52,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116746855] [2022-11-26 00:46:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:52,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:47:00,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116746855] [2022-11-26 00:47:00,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116746855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:00,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088201397] [2022-11-26 00:47:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:00,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:00,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:47:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:47:01,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:47:01,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:47:01,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088201397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:01,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:47:01,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [29] total 31 [2022-11-26 00:47:01,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902698052] [2022-11-26 00:47:01,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:01,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:47:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:01,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:47:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:47:01,180 INFO L87 Difference]: Start difference. First operand 869 states and 1389 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-26 00:47:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:01,537 INFO L93 Difference]: Finished difference Result 952 states and 1513 transitions. [2022-11-26 00:47:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:47:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2022-11-26 00:47:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:01,548 INFO L225 Difference]: With dead ends: 952 [2022-11-26 00:47:01,548 INFO L226 Difference]: Without dead ends: 937 [2022-11-26 00:47:01,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:47:01,551 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 44 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:01,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1717 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:47:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-11-26 00:47:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 873. [2022-11-26 00:47:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 612 states have (on average 1.591503267973856) internal successors, (974), 650 states have internal predecessors, (974), 206 states have call successors, (206), 51 states have call predecessors, (206), 54 states have return successors, (213), 196 states have call predecessors, (213), 201 states have call successors, (213) [2022-11-26 00:47:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1393 transitions. [2022-11-26 00:47:01,652 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1393 transitions. Word has length 105 [2022-11-26 00:47:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:01,655 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1393 transitions. [2022-11-26 00:47:01,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-26 00:47:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1393 transitions. [2022-11-26 00:47:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-26 00:47:01,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:01,661 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:01,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:47:01,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash 24407697, now seen corresponding path program 1 times [2022-11-26 00:47:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:01,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850853249] [2022-11-26 00:47:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-26 00:47:04,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:04,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850853249] [2022-11-26 00:47:04,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850853249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:04,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555768771] [2022-11-26 00:47:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:04,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:04,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:04,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:47:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:47:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:47:05,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:12,593 WARN L233 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 00:49:16,195 WARN L233 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 00:49:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-26 00:49:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555768771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069737644] [2022-11-26 00:49:17,154 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-11-26 00:49:17,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:49:17,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:49:17,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:49:17,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:49:27,159 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 433 for LOIs [2022-11-26 00:49:27,254 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 580 for LOIs [2022-11-26 00:49:31,458 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2022-11-26 00:49:43,443 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 443 for LOIs [2022-11-26 00:49:45,578 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 493 for LOIs [2022-11-26 00:49:47,670 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 76 for LOIs [2022-11-26 00:49:47,687 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 85 for LOIs [2022-11-26 00:49:47,697 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2022-11-26 00:49:51,590 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 28 for LOIs [2022-11-26 00:49:51,592 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 451 for LOIs [2022-11-26 00:49:52,559 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 445 for LOIs [2022-11-26 00:49:52,641 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 552 for LOIs [2022-11-26 00:49:55,547 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 825 for LOIs [2022-11-26 00:52:37,839 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 652 for LOIs [2022-11-26 00:52:38,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:46,572 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 520 DAG size of output: 515 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:04,859 WARN L233 SmtUtils]: Spent 13.29s on a formula simplification. DAG size of input: 652 DAG size of output: 517 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:18,457 WARN L233 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 692 DAG size of output: 531 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:28,729 WARN L233 SmtUtils]: Spent 9.79s on a formula simplification. DAG size of input: 671 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:39,041 WARN L233 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 671 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:53,185 WARN L233 SmtUtils]: Spent 13.31s on a formula simplification. DAG size of input: 825 DAG size of output: 678 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:54:33,624 WARN L233 SmtUtils]: Spent 35.23s on a formula simplification. DAG size of input: 1077 DAG size of output: 694 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:54:49,642 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 560 DAG size of output: 555 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:11,173 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 493 DAG size of output: 464 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:20,107 WARN L233 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 620 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:27,743 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 620 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:35,606 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 622 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:44,920 WARN L233 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 626 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:52,910 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 624 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:00,648 WARN L233 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 630 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:09,032 WARN L233 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 635 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:17,304 WARN L233 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 634 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:58,733 WARN L233 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 645 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:57:06,527 WARN L233 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 645 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:58:26,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16438#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= ~floorButtons_3~0 0) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (<= ~currentHeading~0 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (<= ~currentFloorID~0 2147483647) (= ~calls_3~0 0) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= ~calls_0~0 0) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= ~floorButtons_4~0 0) (= (select |#valid| 18) 1) (= ~calls_1~0 0) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (not (= ~landingButtons_spc1_0~0 0)) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= ~floorButtons_2~0 0) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= 97 (select (select |#memory_int| 19) 1)) (= ~floorButtons_1~0 0) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= ~floorButtons_0~0 0) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (<= 0 ~currentHeading~0) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= ~calls_2~0 0) (= ~calls_4~0 0) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-11-26 00:58:26,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:26,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:26,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 32 [2022-11-26 00:58:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255796035] [2022-11-26 00:58:26,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:26,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:58:26,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:58:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1146, Invalid=12426, Unknown=0, NotChecked=0, Total=13572 [2022-11-26 00:58:26,894 INFO L87 Difference]: Start difference. First operand 873 states and 1393 transitions. Second operand has 32 states, 23 states have (on average 7.260869565217392) internal successors, (167), 27 states have internal predecessors, (167), 14 states have call successors, (56), 7 states have call predecessors, (56), 19 states have return successors, (58), 19 states have call predecessors, (58), 13 states have call successors, (58) [2022-11-26 00:58:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:51,704 INFO L93 Difference]: Finished difference Result 5102 states and 8235 transitions. [2022-11-26 00:58:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-26 00:58:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.260869565217392) internal successors, (167), 27 states have internal predecessors, (167), 14 states have call successors, (56), 7 states have call predecessors, (56), 19 states have return successors, (58), 19 states have call predecessors, (58), 13 states have call successors, (58) Word has length 128 [2022-11-26 00:58:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:51,744 INFO L225 Difference]: With dead ends: 5102 [2022-11-26 00:58:51,744 INFO L226 Difference]: Without dead ends: 4258 [2022-11-26 00:58:51,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 301 SyntacticMatches, 4 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13031 ImplicationChecksByTransitivity, 355.0s TimeCoverageRelationStatistics Valid=2506, Invalid=31166, Unknown=0, NotChecked=0, Total=33672 [2022-11-26 00:58:51,764 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 7445 mSDsluCounter, 7361 mSDsCounter, 0 mSdLazyCounter, 19964 mSolverCounterSat, 4657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7493 SdHoareTripleChecker+Valid, 8023 SdHoareTripleChecker+Invalid, 24621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4657 IncrementalHoareTripleChecker+Valid, 19964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:51,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7493 Valid, 8023 Invalid, 24621 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4657 Valid, 19964 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2022-11-26 00:58:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-11-26 00:58:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3545. [2022-11-26 00:58:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 2547 states have (on average 1.595995288574794) internal successors, (4065), 2684 states have internal predecessors, (4065), 768 states have call successors, (768), 201 states have call predecessors, (768), 229 states have return successors, (844), 739 states have call predecessors, (844), 763 states have call successors, (844) [2022-11-26 00:58:52,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 5677 transitions. [2022-11-26 00:58:52,254 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 5677 transitions. Word has length 128 [2022-11-26 00:58:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:52,255 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 5677 transitions. [2022-11-26 00:58:52,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.260869565217392) internal successors, (167), 27 states have internal predecessors, (167), 14 states have call successors, (56), 7 states have call predecessors, (56), 19 states have return successors, (58), 19 states have call predecessors, (58), 13 states have call successors, (58) [2022-11-26 00:58:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 5677 transitions. [2022-11-26 00:58:52,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-26 00:58:52,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:52,273 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:52,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:52,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:58:52,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash -4694547, now seen corresponding path program 1 times [2022-11-26 00:58:52,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:52,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346670874] [2022-11-26 00:58:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-26 00:58:53,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346670874] [2022-11-26 00:58:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346670874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985663761] [2022-11-26 00:58:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:53,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:53,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:53,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6382a7-3a3d-4452-bb47-62c6103dcdc5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:58:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2230 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:58:53,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-26 00:58:54,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-26 00:58:54,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985663761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946159890] [2022-11-26 00:58:54,531 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-11-26 00:58:54,531 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:54,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:54,532 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:54,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:04,000 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 410 for LOIs [2022-11-26 00:59:04,060 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 580 for LOIs [2022-11-26 00:59:17,725 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 675 for LOIs [2022-11-26 00:59:22,020 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 37 for LOIs [2022-11-26 00:59:22,211 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 24 for LOIs [2022-11-26 00:59:22,244 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 49 for LOIs [2022-11-26 00:59:22,264 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-11-26 00:59:22,266 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2022-11-26 00:59:26,148 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 24 for LOIs [2022-11-26 00:59:26,150 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 31 for LOIs [2022-11-26 00:59:26,219 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 29 for LOIs [2022-11-26 00:59:26,222 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 552 for LOIs [2022-11-26 00:59:28,890 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 825 for LOIs