./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9 --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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- 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-6b4ec56 [2022-11-20 20:19:32,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:19:32,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:19:32,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:19:32,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:19:32,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:19:32,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:19:32,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:19:32,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:19:32,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:19:32,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:19:32,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:19:32,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:19:32,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:19:32,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:19:32,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:19:32,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:19:32,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:19:32,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:19:32,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:19:32,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:19:32,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:19:32,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:19:32,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:19:32,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:19:32,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:19:32,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:19:32,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:19:32,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:19:32,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:19:32,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:19:32,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:19:32,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:19:32,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:19:32,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:19:32,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:19:32,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:19:32,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:19:32,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:19:32,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:19:32,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:19:32,226 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:19:32,276 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:19:32,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:19:32,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:19:32,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:19:32,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:19:32,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:19:32,279 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:19:32,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:19:32,280 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:19:32,280 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:19:32,282 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:19:32,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:19:32,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:19:32,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:19:32,283 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:19:32,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:19:32,284 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:19:32,284 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:19:32,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:19:32,285 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:19:32,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:19:32,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:19:32,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:19:32,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:19:32,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:19:32,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:19:32,287 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:19:32,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:19:32,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:19:32,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:19:32,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:19:32,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:19:32,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:19:32,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:19:32,290 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:19:32,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:19:32,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:19:32,291 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:19:32,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:19:32,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:19:32,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:19:32,292 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_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2022-11-20 20:19:32,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:19:32,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:19:32,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:19:32,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:19:32,696 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:19:32,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-11-20 20:19:35,869 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:19:36,277 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:19:36,278 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-11-20 20:19:36,303 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/data/4ee03a45f/dc94e012a1924a769443f1ea95b39cef/FLAG76975c249 [2022-11-20 20:19:36,320 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/data/4ee03a45f/dc94e012a1924a769443f1ea95b39cef [2022-11-20 20:19:36,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:19:36,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:19:36,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:19:36,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:19:36,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:19:36,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:19:36" (1/1) ... [2022-11-20 20:19:36,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17959b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:36, skipping insertion in model container [2022-11-20 20:19:36,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:19:36" (1/1) ... [2022-11-20 20:19:36,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:19:36,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:19:36,760 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_e8261568-6b4a-4810-8d7e-9d908ae52cfa/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-11-20 20:19:37,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:19:37,102 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:19:37,145 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_e8261568-6b4a-4810-8d7e-9d908ae52cfa/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-11-20 20:19:37,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:19:37,278 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:19:37,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37 WrapperNode [2022-11-20 20:19:37,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:19:37,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:19:37,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:19:37,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:19:37,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,410 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 808 [2022-11-20 20:19:37,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:19:37,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:19:37,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:19:37,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:19:37,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,468 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:19:37,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:19:37,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:19:37,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:19:37,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (1/1) ... [2022-11-20 20:19:37,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:19:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:37,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:19:37,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:19:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:19:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-20 20:19:37,616 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-20 20:19:37,616 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 20:19:37,616 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 20:19:37,616 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 20:19:37,616 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 20:19:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-20 20:19:37,617 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-20 20:19:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 20:19:37,617 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 20:19:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 20:19:37,618 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 20:19:37,618 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 20:19:37,618 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 20:19:37,618 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 20:19:37,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 20:19:37,619 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 20:19:37,620 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 20:19:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 20:19:37,620 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 20:19:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 20:19:37,621 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 20:19:37,622 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-20 20:19:37,622 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-20 20:19:37,623 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 20:19:37,623 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 20:19:37,623 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-20 20:19:37,624 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-20 20:19:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 20:19:37,626 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 20:19:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 20:19:37,626 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 20:19:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 20:19:37,627 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 20:19:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 20:19:37,628 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 20:19:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:19:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-20 20:19:37,629 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-20 20:19:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 20:19:37,629 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 20:19:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 20:19:37,630 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 20:19:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 20:19:37,630 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 20:19:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:19:37,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:19:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 20:19:37,633 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 20:19:37,890 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:19:37,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:19:39,274 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:19:40,254 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:19:40,255 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:19:40,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:19:40 BoogieIcfgContainer [2022-11-20 20:19:40,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:19:40,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:19:40,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:19:40,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:19:40,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:19:36" (1/3) ... [2022-11-20 20:19:40,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14645289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:19:40, skipping insertion in model container [2022-11-20 20:19:40,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:37" (2/3) ... [2022-11-20 20:19:40,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14645289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:19:40, skipping insertion in model container [2022-11-20 20:19:40,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:19:40" (3/3) ... [2022-11-20 20:19:40,275 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2022-11-20 20:19:40,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:19:40,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:19:40,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:19:40,405 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;@6e07a666, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:19:40,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:19:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-20 20:19:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 20:19:40,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:40,448 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:40,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash 13643139, now seen corresponding path program 1 times [2022-11-20 20:19:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:40,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100260033] [2022-11-20 20:19:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:19:41,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:41,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100260033] [2022-11-20 20:19:41,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100260033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:19:41,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:19:41,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:19:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714976696] [2022-11-20 20:19:41,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:19:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:41,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:19:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:19:41,707 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 20:19:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:42,961 INFO L93 Difference]: Finished difference Result 1069 states and 1731 transitions. [2022-11-20 20:19:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:19:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-11-20 20:19:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:42,994 INFO L225 Difference]: With dead ends: 1069 [2022-11-20 20:19:42,994 INFO L226 Difference]: Without dead ends: 694 [2022-11-20 20:19:43,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:19:43,011 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 511 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:43,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1731 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:19:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-20 20:19:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 686. [2022-11-20 20:19:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 465 states have (on average 1.5225806451612902) internal successors, (708), 495 states have internal predecessors, (708), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-11-20 20:19:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1069 transitions. [2022-11-20 20:19:43,137 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1069 transitions. Word has length 63 [2022-11-20 20:19:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:43,138 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1069 transitions. [2022-11-20 20:19:43,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 20:19:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1069 transitions. [2022-11-20 20:19:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 20:19:43,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:43,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:19:43,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash 19520656, now seen corresponding path program 1 times [2022-11-20 20:19:43,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:43,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372562000] [2022-11-20 20:19:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:19:43,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:43,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372562000] [2022-11-20 20:19:43,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372562000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:19:43,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:19:43,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:19:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446692202] [2022-11-20 20:19:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:19:43,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:19:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:19:43,602 INFO L87 Difference]: Start difference. First operand 686 states and 1069 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-20 20:19:44,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:44,038 INFO L93 Difference]: Finished difference Result 1320 states and 2107 transitions. [2022-11-20 20:19:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:19:44,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-11-20 20:19:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:44,047 INFO L225 Difference]: With dead ends: 1320 [2022-11-20 20:19:44,047 INFO L226 Difference]: Without dead ends: 876 [2022-11-20 20:19:44,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:19:44,052 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 139 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:44,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1747 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:19:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-20 20:19:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 690. [2022-11-20 20:19:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 469 states have (on average 1.5181236673773988) internal successors, (712), 499 states have internal predecessors, (712), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-11-20 20:19:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1073 transitions. [2022-11-20 20:19:44,129 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1073 transitions. Word has length 68 [2022-11-20 20:19:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:44,130 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1073 transitions. [2022-11-20 20:19:44,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-20 20:19:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1073 transitions. [2022-11-20 20:19:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 20:19:44,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:44,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:44,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:19:44,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:44,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1309187174, now seen corresponding path program 1 times [2022-11-20 20:19:44,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:44,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024589912] [2022-11-20 20:19:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:44,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:19:44,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:44,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024589912] [2022-11-20 20:19:44,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024589912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:19:44,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454344630] [2022-11-20 20:19:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:44,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:44,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:44,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:19:44,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:19:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:19:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:19:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:19:45,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:19:45,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454344630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:19:45,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:19:45,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-20 20:19:45,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803955110] [2022-11-20 20:19:45,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:45,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:19:45,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:45,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:19:45,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:19:45,506 INFO L87 Difference]: Start difference. First operand 690 states and 1073 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 20:19:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:46,350 INFO L93 Difference]: Finished difference Result 1143 states and 1781 transitions. [2022-11-20 20:19:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:19:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-20 20:19:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:46,359 INFO L225 Difference]: With dead ends: 1143 [2022-11-20 20:19:46,359 INFO L226 Difference]: Without dead ends: 698 [2022-11-20 20:19:46,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:19:46,366 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 420 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:46,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 2295 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:19:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-20 20:19:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2022-11-20 20:19:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.515923566878981) internal successors, (714), 502 states have internal predecessors, (714), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-20 20:19:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1076 transitions. [2022-11-20 20:19:46,437 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1076 transitions. Word has length 72 [2022-11-20 20:19:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:46,437 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1076 transitions. [2022-11-20 20:19:46,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 20:19:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1076 transitions. [2022-11-20 20:19:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 20:19:46,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:46,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:46,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:19:46,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:46,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1183509830, now seen corresponding path program 1 times [2022-11-20 20:19:46,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:46,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088692667] [2022-11-20 20:19:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:19:47,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:47,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088692667] [2022-11-20 20:19:47,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088692667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:19:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752771855] [2022-11-20 20:19:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:47,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:47,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:19:47,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:19:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:19:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:19:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:19:47,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:19:47,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752771855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:19:47,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:19:47,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-20 20:19:47,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367997717] [2022-11-20 20:19:47,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:47,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:19:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:19:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:19:47,491 INFO L87 Difference]: Start difference. First operand 694 states and 1076 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-20 20:19:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:47,732 INFO L93 Difference]: Finished difference Result 1242 states and 1958 transitions. [2022-11-20 20:19:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:19:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-20 20:19:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:47,737 INFO L225 Difference]: With dead ends: 1242 [2022-11-20 20:19:47,737 INFO L226 Difference]: Without dead ends: 694 [2022-11-20 20:19:47,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:19:47,742 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 269 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:47,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1544 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:19:47,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-20 20:19:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2022-11-20 20:19:47,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.4861995753715498) internal successors, (700), 502 states have internal predecessors, (700), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-20 20:19:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1062 transitions. [2022-11-20 20:19:47,825 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1062 transitions. Word has length 73 [2022-11-20 20:19:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:47,825 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1062 transitions. [2022-11-20 20:19:47,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-20 20:19:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1062 transitions. [2022-11-20 20:19:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 20:19:47,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:47,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:47,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:19:48,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:48,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:48,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2120738951, now seen corresponding path program 1 times [2022-11-20 20:19:48,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:48,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712283123] [2022-11-20 20:19:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:48,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:19:48,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712283123] [2022-11-20 20:19:48,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712283123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:19:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025803841] [2022-11-20 20:19:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:48,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:48,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:48,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:19:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:19:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:48,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:19:48,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:19:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:19:49,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:19:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:19:49,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025803841] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:19:49,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:19:49,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-20 20:19:49,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707426166] [2022-11-20 20:19:49,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:49,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:19:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:19:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:19:49,468 INFO L87 Difference]: Start difference. First operand 694 states and 1062 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 20:19:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:53,634 INFO L93 Difference]: Finished difference Result 1635 states and 2612 transitions. [2022-11-20 20:19:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:19:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-20 20:19:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:53,654 INFO L225 Difference]: With dead ends: 1635 [2022-11-20 20:19:53,654 INFO L226 Difference]: Without dead ends: 1275 [2022-11-20 20:19:53,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:19:53,662 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 2834 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 1320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2913 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 3755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1320 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:53,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2913 Valid, 2754 Invalid, 3755 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1320 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 20:19:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-11-20 20:19:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1205. [2022-11-20 20:19:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 838 states have (on average 1.5023866348448687) internal successors, (1259), 885 states have internal predecessors, (1259), 292 states have call successors, (292), 73 states have call predecessors, (292), 74 states have return successors, (329), 282 states have call predecessors, (329), 287 states have call successors, (329) [2022-11-20 20:19:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1880 transitions. [2022-11-20 20:19:53,800 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1880 transitions. Word has length 75 [2022-11-20 20:19:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:53,801 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1880 transitions. [2022-11-20 20:19:53,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 20:19:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1880 transitions. [2022-11-20 20:19:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 20:19:53,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:53,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:53,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:19:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:54,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2022540589, now seen corresponding path program 1 times [2022-11-20 20:19:54,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536952397] [2022-11-20 20:19:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:54,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:19:54,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536952397] [2022-11-20 20:19:54,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536952397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:19:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816369638] [2022-11-20 20:19:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:54,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:54,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:54,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:19:54,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:19:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:19:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:19:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:19:54,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:19:54,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816369638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:19:54,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:19:54,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 20:19:54,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113576706] [2022-11-20 20:19:54,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:54,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:19:54,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:54,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:19:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:19:54,868 INFO L87 Difference]: Start difference. First operand 1205 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 20:19:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:55,224 INFO L93 Difference]: Finished difference Result 3440 states and 5513 transitions. [2022-11-20 20:19:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:19:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2022-11-20 20:19:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:55,247 INFO L225 Difference]: With dead ends: 3440 [2022-11-20 20:19:55,247 INFO L226 Difference]: Without dead ends: 2247 [2022-11-20 20:19:55,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:19:55,259 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:55,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1341 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:19:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-11-20 20:19:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2191. [2022-11-20 20:19:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1534 states have (on average 1.5097783572359844) internal successors, (2316), 1629 states have internal predecessors, (2316), 516 states have call successors, (516), 131 states have call predecessors, (516), 140 states have return successors, (608), 502 states have call predecessors, (608), 511 states have call successors, (608) [2022-11-20 20:19:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 3440 transitions. [2022-11-20 20:19:55,460 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 3440 transitions. Word has length 76 [2022-11-20 20:19:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:55,460 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 3440 transitions. [2022-11-20 20:19:55,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-20 20:19:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 3440 transitions. [2022-11-20 20:19:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 20:19:55,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:55,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:19:55,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:19:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 20:19:55,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 152698590, now seen corresponding path program 1 times [2022-11-20 20:19:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:55,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392481919] [2022-11-20 20:19:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:19:56,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392481919] [2022-11-20 20:19:56,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392481919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:19:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698247541] [2022-11-20 20:19:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:56,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:56,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:56,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:19:56,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:19:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:19:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:19:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:19:56,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:19:56,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698247541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:19:56,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:19:56,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-20 20:19:56,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678758334] [2022-11-20 20:19:56,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:19:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:19:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:19:56,493 INFO L87 Difference]: Start difference. First operand 2191 states and 3440 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 20:19:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:56,936 INFO L93 Difference]: Finished difference Result 5112 states and 8137 transitions. [2022-11-20 20:19:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:19:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-20 20:19:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:56,958 INFO L225 Difference]: With dead ends: 5112 [2022-11-20 20:19:56,958 INFO L226 Difference]: Without dead ends: 2933 [2022-11-20 20:19:56,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:19:56,976 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 521 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:56,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1080 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:19:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-11-20 20:19:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2889. [2022-11-20 20:19:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (797), 652 states have call predecessors, (797), 664 states have call successors, (797) [2022-11-20 20:19:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4555 transitions. [2022-11-20 20:19:57,252 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4555 transitions. Word has length 75 [2022-11-20 20:19:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:57,253 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4555 transitions. [2022-11-20 20:19:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 20:19:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4555 transitions. [2022-11-20 20:19:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 20:19:57,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:57,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:57,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:19:57,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:57,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -154683306, now seen corresponding path program 1 times [2022-11-20 20:19:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:57,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222231484] [2022-11-20 20:19:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:57,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:19:57,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:19:57,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222231484] [2022-11-20 20:19:57,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222231484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:19:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365721086] [2022-11-20 20:19:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:57,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:57,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:19:57,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:19:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:19:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:19:58,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:19:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:19:58,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:19:58,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365721086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:19:58,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:19:58,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-20 20:19:58,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890629787] [2022-11-20 20:19:58,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:19:58,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:19:58,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:19:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:19:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:19:58,392 INFO L87 Difference]: Start difference. First operand 2889 states and 4555 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 20:19:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:19:59,202 INFO L93 Difference]: Finished difference Result 5184 states and 8208 transitions. [2022-11-20 20:19:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:19:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-20 20:19:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:19:59,225 INFO L225 Difference]: With dead ends: 5184 [2022-11-20 20:19:59,225 INFO L226 Difference]: Without dead ends: 2897 [2022-11-20 20:19:59,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:19:59,241 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 396 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:19:59,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2513 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:19:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-11-20 20:19:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2889. [2022-11-20 20:19:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (793), 652 states have call predecessors, (793), 664 states have call successors, (793) [2022-11-20 20:19:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4551 transitions. [2022-11-20 20:19:59,501 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4551 transitions. Word has length 79 [2022-11-20 20:19:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:19:59,502 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4551 transitions. [2022-11-20 20:19:59,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 20:19:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4551 transitions. [2022-11-20 20:19:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 20:19:59,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:19:59,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:19:59,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:19:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:19:59,719 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:19:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:19:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1242674534, now seen corresponding path program 1 times [2022-11-20 20:19:59,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:19:59,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065686345] [2022-11-20 20:19:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:19:59,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:19:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:20:00,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065686345] [2022-11-20 20:20:00,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065686345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790166491] [2022-11-20 20:20:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:00,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:00,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:00,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:00,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:20:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:20:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:20:00,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:00,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790166491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:00,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:00,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-20 20:20:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154065099] [2022-11-20 20:20:00,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:20:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:20:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:20:00,513 INFO L87 Difference]: Start difference. First operand 2889 states and 4551 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 20:20:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:00,834 INFO L93 Difference]: Finished difference Result 5459 states and 8715 transitions. [2022-11-20 20:20:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:20:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-20 20:20:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:00,860 INFO L225 Difference]: With dead ends: 5459 [2022-11-20 20:20:00,861 INFO L226 Difference]: Without dead ends: 3010 [2022-11-20 20:20:00,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:20:00,879 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 13 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:00,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2208 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:20:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-20 20:20:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2933. [2022-11-20 20:20:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2065 states have (on average 1.510411622276029) internal successors, (3119), 2198 states have internal predecessors, (3119), 669 states have call successors, (669), 170 states have call predecessors, (669), 198 states have return successors, (833), 660 states have call predecessors, (833), 664 states have call successors, (833) [2022-11-20 20:20:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4621 transitions. [2022-11-20 20:20:01,148 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4621 transitions. Word has length 99 [2022-11-20 20:20:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:01,149 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 4621 transitions. [2022-11-20 20:20:01,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 20:20:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4621 transitions. [2022-11-20 20:20:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 20:20:01,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:01,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:01,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:01,365 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash -997829384, now seen corresponding path program 1 times [2022-11-20 20:20:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:01,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991542985] [2022-11-20 20:20:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:01,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:20:01,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991542985] [2022-11-20 20:20:01,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991542985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407013284] [2022-11-20 20:20:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:01,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:01,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:01,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:20:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:02,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:20:02,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:20:02,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:02,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407013284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:02,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:02,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-20 20:20:02,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288517202] [2022-11-20 20:20:02,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:02,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:20:02,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:20:02,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:20:02,277 INFO L87 Difference]: Start difference. First operand 2933 states and 4621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-20 20:20:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:02,702 INFO L93 Difference]: Finished difference Result 6625 states and 10624 transitions. [2022-11-20 20:20:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:20:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2022-11-20 20:20:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:02,735 INFO L225 Difference]: With dead ends: 6625 [2022-11-20 20:20:02,735 INFO L226 Difference]: Without dead ends: 3704 [2022-11-20 20:20:02,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:20:02,758 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 529 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:02,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1282 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:20:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-11-20 20:20:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-11-20 20:20:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.512412723041117) internal successors, (3899), 2745 states have internal predecessors, (3899), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-20 20:20:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5761 transitions. [2022-11-20 20:20:03,163 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5761 transitions. Word has length 117 [2022-11-20 20:20:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:03,164 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5761 transitions. [2022-11-20 20:20:03,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-20 20:20:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5761 transitions. [2022-11-20 20:20:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 20:20:03,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:03,174 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:03,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:03,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 20:20:03,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991831, now seen corresponding path program 1 times [2022-11-20 20:20:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:03,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941937494] [2022-11-20 20:20:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:20:03,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:03,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941937494] [2022-11-20 20:20:03,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941937494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:03,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112615361] [2022-11-20 20:20:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:03,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:03,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:03,865 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:03,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:20:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:20:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:20:04,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:04,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112615361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:04,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:04,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-20 20:20:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019865879] [2022-11-20 20:20:04,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:04,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:20:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:20:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:20:04,372 INFO L87 Difference]: Start difference. First operand 3648 states and 5761 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-20 20:20:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:04,832 INFO L93 Difference]: Finished difference Result 7340 states and 11753 transitions. [2022-11-20 20:20:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:20:04,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-20 20:20:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:04,863 INFO L225 Difference]: With dead ends: 7340 [2022-11-20 20:20:04,864 INFO L226 Difference]: Without dead ends: 3704 [2022-11-20 20:20:04,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:20:04,889 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:04,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1492 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:20:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-11-20 20:20:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-11-20 20:20:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.5096974398758727) internal successors, (3892), 2745 states have internal predecessors, (3892), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-20 20:20:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5754 transitions. [2022-11-20 20:20:05,224 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5754 transitions. Word has length 118 [2022-11-20 20:20:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:05,224 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5754 transitions. [2022-11-20 20:20:05,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-20 20:20:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5754 transitions. [2022-11-20 20:20:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 20:20:05,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:05,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:05,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:05,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:05,444 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash 774985050, now seen corresponding path program 1 times [2022-11-20 20:20:05,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:05,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625838251] [2022-11-20 20:20:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:20:05,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:05,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625838251] [2022-11-20 20:20:05,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625838251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:05,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31931823] [2022-11-20 20:20:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:05,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:05,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:05,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:20:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:20:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:20:06,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:06,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31931823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:06,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:06,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-20 20:20:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665297689] [2022-11-20 20:20:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:20:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:20:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:20:06,422 INFO L87 Difference]: Start difference. First operand 3648 states and 5754 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-20 20:20:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:10,459 INFO L93 Difference]: Finished difference Result 8197 states and 13092 transitions. [2022-11-20 20:20:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 20:20:10,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-20 20:20:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:10,492 INFO L225 Difference]: With dead ends: 8197 [2022-11-20 20:20:10,492 INFO L226 Difference]: Without dead ends: 4435 [2022-11-20 20:20:10,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:20:10,511 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1604 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 4673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:10,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 1528 Invalid, 4673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 20:20:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2022-11-20 20:20:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3643. [2022-11-20 20:20:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2573 states have (on average 1.5102992615623785) internal successors, (3886), 2740 states have internal predecessors, (3886), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-20 20:20:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5748 transitions. [2022-11-20 20:20:10,985 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5748 transitions. Word has length 117 [2022-11-20 20:20:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:10,986 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5748 transitions. [2022-11-20 20:20:10,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-20 20:20:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5748 transitions. [2022-11-20 20:20:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 20:20:10,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:10,997 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:11,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:11,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:11,206 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:11,207 INFO L85 PathProgramCache]: Analyzing trace with hash -834393372, now seen corresponding path program 1 times [2022-11-20 20:20:11,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:11,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053144291] [2022-11-20 20:20:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:11,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:20:11,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:11,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053144291] [2022-11-20 20:20:11,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053144291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:11,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631900943] [2022-11-20 20:20:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:11,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:11,734 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:11,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:20:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:12,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:20:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:20:12,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:12,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631900943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:12,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:12,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-20 20:20:12,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301903201] [2022-11-20 20:20:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:12,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:20:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:20:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:20:12,242 INFO L87 Difference]: Start difference. First operand 3643 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-20 20:20:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:13,591 INFO L93 Difference]: Finished difference Result 7538 states and 12125 transitions. [2022-11-20 20:20:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:20:13,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-20 20:20:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:13,616 INFO L225 Difference]: With dead ends: 7538 [2022-11-20 20:20:13,617 INFO L226 Difference]: Without dead ends: 4514 [2022-11-20 20:20:13,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:20:13,632 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 673 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:13,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1172 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:20:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2022-11-20 20:20:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4401. [2022-11-20 20:20:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 3011 states have (on average 1.4985054799070077) internal successors, (4512), 3226 states have internal predecessors, (4512), 1081 states have call successors, (1081), 279 states have call predecessors, (1081), 308 states have return successors, (1351), 1063 states have call predecessors, (1351), 1074 states have call successors, (1351) [2022-11-20 20:20:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 6944 transitions. [2022-11-20 20:20:13,991 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 6944 transitions. Word has length 123 [2022-11-20 20:20:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:13,992 INFO L495 AbstractCegarLoop]: Abstraction has 4401 states and 6944 transitions. [2022-11-20 20:20:13,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-20 20:20:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 6944 transitions. [2022-11-20 20:20:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 20:20:13,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:14,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:14,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:14,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:20:14,208 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash 357934980, now seen corresponding path program 1 times [2022-11-20 20:20:14,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:14,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465688184] [2022-11-20 20:20:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:20:14,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465688184] [2022-11-20 20:20:14,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465688184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561398753] [2022-11-20 20:20:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:14,634 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:14,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:20:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:20:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:20:15,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:15,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561398753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:15,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:15,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-20 20:20:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427526746] [2022-11-20 20:20:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:20:15,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:20:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:20:15,094 INFO L87 Difference]: Start difference. First operand 4401 states and 6944 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-20 20:20:16,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:16,751 INFO L93 Difference]: Finished difference Result 11083 states and 17801 transitions. [2022-11-20 20:20:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:20:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-20 20:20:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:16,859 INFO L225 Difference]: With dead ends: 11083 [2022-11-20 20:20:16,859 INFO L226 Difference]: Without dead ends: 7279 [2022-11-20 20:20:16,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:20:16,893 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 551 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:16,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:20:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2022-11-20 20:20:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2022-11-20 20:20:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7261 states, 4887 states have (on average 1.4923265807243709) internal successors, (7293), 5268 states have internal predecessors, (7293), 1869 states have call successors, (1869), 473 states have call predecessors, (1869), 504 states have return successors, (2297), 1831 states have call predecessors, (2297), 1858 states have call successors, (2297) [2022-11-20 20:20:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 11459 transitions. [2022-11-20 20:20:17,582 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 11459 transitions. Word has length 124 [2022-11-20 20:20:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:17,583 INFO L495 AbstractCegarLoop]: Abstraction has 7261 states and 11459 transitions. [2022-11-20 20:20:17,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-20 20:20:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 11459 transitions. [2022-11-20 20:20:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-20 20:20:17,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:17,594 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:17,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:17,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 20:20:17,802 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash 530631708, now seen corresponding path program 1 times [2022-11-20 20:20:17,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:17,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675371882] [2022-11-20 20:20:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:17,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:20:18,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675371882] [2022-11-20 20:20:18,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675371882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090494357] [2022-11-20 20:20:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:18,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:18,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:18,311 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:18,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:20:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:20:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:20:18,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:18,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090494357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:18,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:18,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-20 20:20:18,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001476473] [2022-11-20 20:20:18,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:18,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:20:18,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:20:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:20:18,853 INFO L87 Difference]: Start difference. First operand 7261 states and 11459 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-20 20:20:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:20,814 INFO L93 Difference]: Finished difference Result 18186 states and 29039 transitions. [2022-11-20 20:20:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:20:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-20 20:20:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:20,883 INFO L225 Difference]: With dead ends: 18186 [2022-11-20 20:20:20,883 INFO L226 Difference]: Without dead ends: 11544 [2022-11-20 20:20:20,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:20:20,931 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 656 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:20,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 4248 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:20:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2022-11-20 20:20:21,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 10469. [2022-11-20 20:20:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 6995 states have (on average 1.4932094353109364) internal successors, (10445), 7562 states have internal predecessors, (10445), 2765 states have call successors, (2765), 667 states have call predecessors, (2765), 708 states have return successors, (3474), 2719 states have call predecessors, (3474), 2748 states have call successors, (3474) [2022-11-20 20:20:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 16684 transitions. [2022-11-20 20:20:21,889 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 16684 transitions. Word has length 125 [2022-11-20 20:20:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:21,890 INFO L495 AbstractCegarLoop]: Abstraction has 10469 states and 16684 transitions. [2022-11-20 20:20:21,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-20 20:20:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 16684 transitions. [2022-11-20 20:20:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 20:20:21,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:21,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:21,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:22,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:22,110 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash 388142882, now seen corresponding path program 1 times [2022-11-20 20:20:22,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:22,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141898111] [2022-11-20 20:20:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 20:20:22,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:22,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141898111] [2022-11-20 20:20:22,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141898111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323051300] [2022-11-20 20:20:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:22,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:22,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:22,476 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:22,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 20:20:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:20:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:20:23,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:20:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323051300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595323601] [2022-11-20 20:20:23,358 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-20 20:20:23,358 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:20:23,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:20:23,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:20:23,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:20:32,549 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-20 20:21:21,591 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-20 20:21:21,594 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-20 20:21:21,831 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 36 for LOIs [2022-11-20 20:21:21,833 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 448 for LOIs [2022-11-20 20:21:22,019 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-11-20 20:21:22,032 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-20 20:21:24,226 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-20 20:21:24,487 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 39 for LOIs [2022-11-20 20:21:24,502 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 30 for LOIs [2022-11-20 20:21:24,512 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-20 20:21:28,267 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-20 20:21:28,877 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-20 20:21:29,027 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:22:01,093 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:08,253 WARN L233 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:16,637 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:35,336 WARN L233 SmtUtils]: Spent 12.71s on a formula simplification. DAG size of input: 677 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:48,975 WARN L233 SmtUtils]: Spent 13.26s on a formula simplification. DAG size of input: 633 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:04,228 WARN L233 SmtUtils]: Spent 14.56s on a formula simplification. DAG size of input: 668 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:19,514 WARN L233 SmtUtils]: Spent 14.80s on a formula simplification. DAG size of input: 668 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:35,347 WARN L233 SmtUtils]: Spent 14.86s on a formula simplification. DAG size of input: 669 DAG size of output: 612 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:52,208 WARN L233 SmtUtils]: Spent 15.69s on a formula simplification. DAG size of input: 680 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:24:07,278 WARN L233 SmtUtils]: Spent 14.52s on a formula simplification. DAG size of input: 667 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:24:14,504 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 668 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:24:38,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192521#(and (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-20 20:24:38,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:24:38,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:24:38,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-20 20:24:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809781468] [2022-11-20 20:24:38,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 20:24:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:24:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 20:24:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 20:24:38,347 INFO L87 Difference]: Start difference. First operand 10469 states and 16684 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-20 20:25:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:00,648 INFO L93 Difference]: Finished difference Result 51622 states and 88186 transitions. [2022-11-20 20:25:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 20:25:00,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2022-11-20 20:25:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:00,868 INFO L225 Difference]: With dead ends: 51622 [2022-11-20 20:25:00,868 INFO L226 Difference]: Without dead ends: 36010 [2022-11-20 20:25:01,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11646 ImplicationChecksByTransitivity, 192.0s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-20 20:25:01,043 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 7976 mSDsluCounter, 7242 mSDsCounter, 0 mSdLazyCounter, 20133 mSolverCounterSat, 5666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8144 SdHoareTripleChecker+Valid, 8112 SdHoareTripleChecker+Invalid, 25799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5666 IncrementalHoareTripleChecker+Valid, 20133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:01,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8144 Valid, 8112 Invalid, 25799 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5666 Valid, 20133 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-20 20:25:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36010 states. [2022-11-20 20:25:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36010 to 27876. [2022-11-20 20:25:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27876 states, 18609 states have (on average 1.4911064538664087) internal successors, (27748), 20488 states have internal predecessors, (27748), 7585 states have call successors, (7585), 1491 states have call predecessors, (7585), 1681 states have return successors, (10918), 6897 states have call predecessors, (10918), 7557 states have call successors, (10918) [2022-11-20 20:25:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27876 states to 27876 states and 46251 transitions. [2022-11-20 20:25:04,204 INFO L78 Accepts]: Start accepts. Automaton has 27876 states and 46251 transitions. Word has length 127 [2022-11-20 20:25:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:04,205 INFO L495 AbstractCegarLoop]: Abstraction has 27876 states and 46251 transitions. [2022-11-20 20:25:04,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-20 20:25:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 27876 states and 46251 transitions. [2022-11-20 20:25:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 20:25:04,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:04,220 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:25:04,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:04,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:25:04,428 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash -858915501, now seen corresponding path program 1 times [2022-11-20 20:25:04,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133632716] [2022-11-20 20:25:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 20:25:04,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:04,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133632716] [2022-11-20 20:25:04,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133632716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:04,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810860850] [2022-11-20 20:25:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:04,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:04,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:04,901 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:04,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 20:25:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:25:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:25:05,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:05,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810860850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:05,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:05,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-20 20:25:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423655684] [2022-11-20 20:25:05,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:05,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:25:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:25:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:25:05,345 INFO L87 Difference]: Start difference. First operand 27876 states and 46251 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-20 20:25:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:07,779 INFO L93 Difference]: Finished difference Result 56544 states and 95557 transitions. [2022-11-20 20:25:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:25:07,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2022-11-20 20:25:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:08,244 INFO L225 Difference]: With dead ends: 56544 [2022-11-20 20:25:08,244 INFO L226 Difference]: Without dead ends: 26613 [2022-11-20 20:25:08,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:25:08,759 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 177 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:08,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1554 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-11-20 20:25:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26591. [2022-11-20 20:25:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26591 states, 17541 states have (on average 1.4765406761302091) internal successors, (25900), 19402 states have internal predecessors, (25900), 7409 states have call successors, (7409), 1467 states have call predecessors, (7409), 1640 states have return successors, (10662), 6722 states have call predecessors, (10662), 7381 states have call successors, (10662) [2022-11-20 20:25:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26591 states to 26591 states and 43971 transitions. [2022-11-20 20:25:11,727 INFO L78 Accepts]: Start accepts. Automaton has 26591 states and 43971 transitions. Word has length 136 [2022-11-20 20:25:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:11,728 INFO L495 AbstractCegarLoop]: Abstraction has 26591 states and 43971 transitions. [2022-11-20 20:25:11,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-20 20:25:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 26591 states and 43971 transitions. [2022-11-20 20:25:11,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-20 20:25:11,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:11,744 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:25:11,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:11,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 20:25:11,953 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1444136859, now seen corresponding path program 1 times [2022-11-20 20:25:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:11,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274454691] [2022-11-20 20:25:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 20:25:12,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:12,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274454691] [2022-11-20 20:25:12,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274454691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:12,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339064894] [2022-11-20 20:25:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:12,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:12,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:12,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 20:25:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:25:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:25:13,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:25:13,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339064894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:13,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135937560] [2022-11-20 20:25:13,648 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-20 20:25:13,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:25:13,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:25:13,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:25:13,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:25:18,285 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-11-20 20:25:24,812 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 491 for LOIs [2022-11-20 20:25:25,190 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-20 20:25:27,380 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-20 20:25:27,623 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-11-20 20:25:27,781 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-20 20:25:32,097 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-20 20:25:32,703 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-20 20:25:32,926 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:26:04,614 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:11,764 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:20,205 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:42,830 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:48,871 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:59,088 WARN L233 SmtUtils]: Spent 9.08s on a formula simplification. DAG size of input: 491 DAG size of output: 438 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:08,709 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 527 DAG size of output: 446 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:14,940 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 622 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:21,095 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 620 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:28,322 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 625 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:34,586 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 625 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:34,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1135937560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:27:34,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:27:34,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 6, 7] total 39 [2022-11-20 20:27:34,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321691144] [2022-11-20 20:27:34,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:27:34,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:27:34,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:27:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 20:27:34,596 INFO L87 Difference]: Start difference. First operand 26591 states and 43971 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 20:27:41,404 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 606 DAG size of output: 571 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:47,598 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 612 DAG size of output: 577 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:28:04,318 WARN L233 SmtUtils]: Spent 10.38s on a formula simplification. DAG size of input: 589 DAG size of output: 572 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:28:15,088 WARN L233 SmtUtils]: Spent 10.49s on a formula simplification. DAG size of input: 595 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:28:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:28:44,159 INFO L93 Difference]: Finished difference Result 53276 states and 87641 transitions. [2022-11-20 20:28:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 20:28:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-11-20 20:28:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:28:44,350 INFO L225 Difference]: With dead ends: 53276 [2022-11-20 20:28:44,351 INFO L226 Difference]: Without dead ends: 26713 [2022-11-20 20:28:44,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 383 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 160.1s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 20:28:44,648 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 173 mSDsluCounter, 3754 mSDsCounter, 0 mSdLazyCounter, 5171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 5220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 5171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:28:44,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 4324 Invalid, 5220 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 5171 Invalid, 0 Unknown, 0 Unchecked, 28.9s Time] [2022-11-20 20:28:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26713 states. [2022-11-20 20:28:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26713 to 26634. [2022-11-20 20:28:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26634 states, 17574 states have (on average 1.475873449413907) internal successors, (25937), 19434 states have internal predecessors, (25937), 7415 states have call successors, (7415), 1472 states have call predecessors, (7415), 1644 states have return successors, (10668), 6728 states have call predecessors, (10668), 7387 states have call successors, (10668) [2022-11-20 20:28:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26634 states to 26634 states and 44020 transitions. [2022-11-20 20:28:47,191 INFO L78 Accepts]: Start accepts. Automaton has 26634 states and 44020 transitions. Word has length 140 [2022-11-20 20:28:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:28:47,192 INFO L495 AbstractCegarLoop]: Abstraction has 26634 states and 44020 transitions. [2022-11-20 20:28:47,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 20:28:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 26634 states and 44020 transitions. [2022-11-20 20:28:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 20:28:47,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:28:47,215 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:28:47,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:28:47,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 20:28:47,423 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:28:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:28:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 493869230, now seen corresponding path program 1 times [2022-11-20 20:28:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:28:47,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073323402] [2022-11-20 20:28:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:28:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:28:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 20:28:48,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:28:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073323402] [2022-11-20 20:28:48,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073323402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:28:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985173831] [2022-11-20 20:28:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:28:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:28:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:28:48,690 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:28:48,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 20:28:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:28:49,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:28:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 20:28:49,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:28:49,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985173831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:28:49,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:28:49,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-20 20:28:49,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568082948] [2022-11-20 20:28:49,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:28:49,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:28:49,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:28:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:28:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:28:49,247 INFO L87 Difference]: Start difference. First operand 26634 states and 44020 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-20 20:28:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:28:53,056 INFO L93 Difference]: Finished difference Result 51319 states and 85476 transitions. [2022-11-20 20:28:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:28:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-11-20 20:28:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:28:53,221 INFO L225 Difference]: With dead ends: 51319 [2022-11-20 20:28:53,222 INFO L226 Difference]: Without dead ends: 25848 [2022-11-20 20:28:53,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:28:53,412 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 655 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:28:53,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 4110 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 20:28:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25848 states. [2022-11-20 20:28:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25848 to 24852. [2022-11-20 20:28:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24852 states, 16415 states have (on average 1.4768199817240328) internal successors, (24242), 18114 states have internal predecessors, (24242), 6818 states have call successors, (6818), 1455 states have call predecessors, (6818), 1618 states have return successors, (9665), 6197 states have call predecessors, (9665), 6782 states have call successors, (9665) [2022-11-20 20:28:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24852 states to 24852 states and 40725 transitions. [2022-11-20 20:28:55,989 INFO L78 Accepts]: Start accepts. Automaton has 24852 states and 40725 transitions. Word has length 139 [2022-11-20 20:28:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:28:55,990 INFO L495 AbstractCegarLoop]: Abstraction has 24852 states and 40725 transitions. [2022-11-20 20:28:55,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-20 20:28:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24852 states and 40725 transitions. [2022-11-20 20:28:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-20 20:28:56,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:28:56,008 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:28:56,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:28:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:28:56,218 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:28:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:28:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash 549565040, now seen corresponding path program 1 times [2022-11-20 20:28:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:28:56,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733842468] [2022-11-20 20:28:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:28:56,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:28:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 20:28:57,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:28:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733842468] [2022-11-20 20:28:57,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733842468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:28:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834422176] [2022-11-20 20:28:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:28:57,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:28:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:28:57,382 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:28:57,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 20:28:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:57,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:28:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:28:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:28:57,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:28:57,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834422176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:28:57,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:28:57,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2022-11-20 20:28:57,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022609782] [2022-11-20 20:28:57,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:28:57,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:28:57,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:28:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:28:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:28:57,802 INFO L87 Difference]: Start difference. First operand 24852 states and 40725 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-20 20:29:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:29:00,185 INFO L93 Difference]: Finished difference Result 45177 states and 75769 transitions. [2022-11-20 20:29:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:29:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-11-20 20:29:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:29:00,334 INFO L225 Difference]: With dead ends: 45177 [2022-11-20 20:29:00,335 INFO L226 Difference]: Without dead ends: 21470 [2022-11-20 20:29:00,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:29:00,758 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 100 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:29:00,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1284 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:29:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21470 states. [2022-11-20 20:29:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21470 to 21311. [2022-11-20 20:29:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 14171 states have (on average 1.4632700585703198) internal successors, (20736), 15530 states have internal predecessors, (20736), 5707 states have call successors, (5707), 1289 states have call predecessors, (5707), 1432 states have return successors, (8234), 5242 states have call predecessors, (8234), 5671 states have call successors, (8234) [2022-11-20 20:29:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 34677 transitions. [2022-11-20 20:29:02,812 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 34677 transitions. Word has length 142 [2022-11-20 20:29:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:29:02,813 INFO L495 AbstractCegarLoop]: Abstraction has 21311 states and 34677 transitions. [2022-11-20 20:29:02,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-20 20:29:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 34677 transitions. [2022-11-20 20:29:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-20 20:29:02,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:29:02,827 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:29:02,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:29:03,035 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:29:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:29:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1563552564, now seen corresponding path program 1 times [2022-11-20 20:29:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:29:03,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006155877] [2022-11-20 20:29:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:29:03,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:29:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:29:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 20:29:04,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:29:04,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006155877] [2022-11-20 20:29:04,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006155877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:29:04,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280729337] [2022-11-20 20:29:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:29:04,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:29:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:29:04,441 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:29:04,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 20:29:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:29:04,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:29:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:29:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:29:04,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:29:04,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280729337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:29:04,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:29:04,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-20 20:29:04,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329570364] [2022-11-20 20:29:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:29:04,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:29:04,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:29:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:29:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:29:04,956 INFO L87 Difference]: Start difference. First operand 21311 states and 34677 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-20 20:29:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:29:08,488 INFO L93 Difference]: Finished difference Result 41441 states and 67385 transitions. [2022-11-20 20:29:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:29:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-11-20 20:29:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:29:08,592 INFO L225 Difference]: With dead ends: 41441 [2022-11-20 20:29:08,592 INFO L226 Difference]: Without dead ends: 21379 [2022-11-20 20:29:08,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:29:08,698 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 551 mSDsluCounter, 3951 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:29:08,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 4893 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 20:29:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2022-11-20 20:29:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 21355. [2022-11-20 20:29:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 14215 states have (on average 1.4618360886387618) internal successors, (20780), 15552 states have internal predecessors, (20780), 5707 states have call successors, (5707), 1311 states have call predecessors, (5707), 1432 states have return successors, (8182), 5242 states have call predecessors, (8182), 5671 states have call successors, (8182) [2022-11-20 20:29:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 34669 transitions. [2022-11-20 20:29:10,439 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 34669 transitions. Word has length 142 [2022-11-20 20:29:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:29:10,439 INFO L495 AbstractCegarLoop]: Abstraction has 21355 states and 34669 transitions. [2022-11-20 20:29:10,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-20 20:29:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 34669 transitions. [2022-11-20 20:29:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-20 20:29:10,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:29:10,449 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:29:10,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:10,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8261568-6b4a-4810-8d7e-9d908ae52cfa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 20:29:10,650 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:29:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:29:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash -251274282, now seen corresponding path program 1 times [2022-11-20 20:29:10,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:29:10,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810447579] [2022-11-20 20:29:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:29:10,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:29:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:29:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 20:29:10,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:29:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810447579] [2022-11-20 20:29:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810447579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:29:10,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:29:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:29:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661896650] [2022-11-20 20:29:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:29:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:29:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:29:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:29:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:29:10,825 INFO L87 Difference]: Start difference. First operand 21355 states and 34669 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23)