./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh --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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- 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-2329fc7 [2022-12-14 15:54:14,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:54:14,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:54:14,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:54:14,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:54:14,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:54:14,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:54:14,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:54:14,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:54:14,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:54:14,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:54:14,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:54:14,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:54:14,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:54:14,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:54:14,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:54:14,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:54:14,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:54:14,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:54:14,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:54:14,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:54:14,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:54:14,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:54:14,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:54:14,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:54:14,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:54:14,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:54:14,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:54:14,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:54:14,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:54:14,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:54:14,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:54:14,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:54:14,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:54:14,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:54:14,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:54:14,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:54:14,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:54:14,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:54:14,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:54:14,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:54:14,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:54:14,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:54:14,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:54:14,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:54:14,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:54:14,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:54:14,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:54:14,571 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:54:14,571 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:54:14,571 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:54:14,571 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:54:14,572 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:54:14,572 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:54:14,572 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:54:14,572 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:54:14,572 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:54:14,573 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:54:14,573 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:54:14,573 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:54:14,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:54:14,574 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:54:14,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:54:14,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:54:14,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:54:14,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:54:14,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:54:14,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:54:14,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:54:14,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:54:14,576 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:54:14,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:54:14,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:54:14,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:54:14,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:54:14,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:54:14,577 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:54:14,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:54:14,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:54:14,578 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:54:14,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:54:14,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:54:14,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:54:14,578 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_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2022-12-14 15:54:14,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:54:14,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:54:14,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:54:14,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:54:14,793 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:54:14,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2022-12-14 15:54:17,337 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:54:17,559 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:54:17,560 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2022-12-14 15:54:17,573 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/data/913c72b42/67abd9f97f23448aa4a278363b08586c/FLAG89299ec96 [2022-12-14 15:54:17,584 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/data/913c72b42/67abd9f97f23448aa4a278363b08586c [2022-12-14 15:54:17,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:54:17,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:54:17,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:54:17,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:54:17,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:54:17,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:54:17" (1/1) ... [2022-12-14 15:54:17,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3b0277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:17, skipping insertion in model container [2022-12-14 15:54:17,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:54:17" (1/1) ... [2022-12-14 15:54:17,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:54:17,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:54:17,860 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_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2022-12-14 15:54:17,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:54:17,944 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:54:17,984 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_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2022-12-14 15:54:18,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:54:18,033 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:54:18,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18 WrapperNode [2022-12-14 15:54:18,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:54:18,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:54:18,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:54:18,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:54:18,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,084 INFO L138 Inliner]: procedures = 90, calls = 344, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 819 [2022-12-14 15:54:18,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:54:18,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:54:18,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:54:18,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:54:18,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,116 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:54:18,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:54:18,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:54:18,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:54:18,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (1/1) ... [2022-12-14 15:54:18,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:54:18,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:18,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:54:18,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:54:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:54:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 15:54:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 15:54:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 15:54:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 15:54:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 15:54:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 15:54:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 15:54:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 15:54:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 15:54:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 15:54:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 15:54:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 15:54:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 15:54:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 15:54:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 15:54:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 15:54:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 15:54:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 15:54:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 15:54:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 15:54:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 15:54:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 15:54:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 15:54:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 15:54:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 15:54:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 15:54:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 15:54:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 15:54:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 15:54:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 15:54:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 15:54:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 15:54:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 15:54:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 15:54:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 15:54:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 15:54:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 15:54:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 15:54:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:54:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2022-12-14 15:54:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2022-12-14 15:54:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 15:54:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 15:54:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 15:54:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 15:54:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 15:54:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 15:54:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 15:54:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 15:54:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:54:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:54:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 15:54:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 15:54:18,331 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:54:18,334 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:54:19,085 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:54:19,568 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:54:19,569 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:54:19,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:54:19 BoogieIcfgContainer [2022-12-14 15:54:19,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:54:19,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:54:19,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:54:19,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:54:19,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:54:17" (1/3) ... [2022-12-14 15:54:19,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330c3d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:54:19, skipping insertion in model container [2022-12-14 15:54:19,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:54:18" (2/3) ... [2022-12-14 15:54:19,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330c3d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:54:19, skipping insertion in model container [2022-12-14 15:54:19,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:54:19" (3/3) ... [2022-12-14 15:54:19,577 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2022-12-14 15:54:19,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:54:19,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:54:19,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:54:19,648 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;@3c887556, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:54:19,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:54:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-12-14 15:54:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:54:19,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:19,666 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] [2022-12-14 15:54:19,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1214067173, now seen corresponding path program 1 times [2022-12-14 15:54:19,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:19,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546391273] [2022-12-14 15:54:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:19,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:54:20,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:20,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546391273] [2022-12-14 15:54:20,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546391273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848845322] [2022-12-14 15:54:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:20,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:20,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:20,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:54:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:54:20,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:54:20,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848845322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:20,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:20,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:54:20,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963186136] [2022-12-14 15:54:20,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:54:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:54:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:54:20,466 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:54:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:20,736 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2022-12-14 15:54:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:54:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-12-14 15:54:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:20,756 INFO L225 Difference]: With dead ends: 1095 [2022-12-14 15:54:20,756 INFO L226 Difference]: Without dead ends: 707 [2022-12-14 15:54:20,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:54:20,767 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 587 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:20,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1151 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:54:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-12-14 15:54:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2022-12-14 15:54:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2022-12-14 15:54:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2022-12-14 15:54:20,841 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2022-12-14 15:54:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:20,842 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2022-12-14 15:54:20,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:54:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2022-12-14 15:54:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 15:54:20,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:20,845 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] [2022-12-14 15:54:20,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:54:21,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 15:54:21,046 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:21,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash -444681761, now seen corresponding path program 1 times [2022-12-14 15:54:21,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:21,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639675158] [2022-12-14 15:54:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:21,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:54:21,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639675158] [2022-12-14 15:54:21,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639675158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:21,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:54:21,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:54:21,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521269911] [2022-12-14 15:54:21,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:21,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:54:21,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:54:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:54:21,286 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:54:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:21,540 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2022-12-14 15:54:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:54:21,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2022-12-14 15:54:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:21,552 INFO L225 Difference]: With dead ends: 2057 [2022-12-14 15:54:21,552 INFO L226 Difference]: Without dead ends: 1374 [2022-12-14 15:54:21,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:54:21,557 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 576 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:21,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1268 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:54:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-12-14 15:54:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2022-12-14 15:54:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2022-12-14 15:54:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2022-12-14 15:54:21,646 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2022-12-14 15:54:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:21,646 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2022-12-14 15:54:21,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:54:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2022-12-14 15:54:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 15:54:21,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:21,653 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, 1] [2022-12-14 15:54:21,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:54:21,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:21,654 INFO L85 PathProgramCache]: Analyzing trace with hash -676803988, now seen corresponding path program 1 times [2022-12-14 15:54:21,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:21,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752544784] [2022-12-14 15:54:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:21,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:54:21,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:21,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752544784] [2022-12-14 15:54:21,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752544784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:21,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:54:21,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:54:21,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7559429] [2022-12-14 15:54:21,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:21,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:54:21,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:21,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:54:21,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:54:21,923 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 15:54:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:22,173 INFO L93 Difference]: Finished difference Result 2993 states and 4835 transitions. [2022-12-14 15:54:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:54:22,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2022-12-14 15:54:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:22,187 INFO L225 Difference]: With dead ends: 2993 [2022-12-14 15:54:22,187 INFO L226 Difference]: Without dead ends: 1715 [2022-12-14 15:54:22,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:54:22,196 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 435 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:22,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1606 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:54:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-12-14 15:54:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1673. [2022-12-14 15:54:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1167 states have (on average 1.5569837189374465) internal successors, (1817), 1221 states have internal predecessors, (1817), 394 states have call successors, (394), 104 states have call predecessors, (394), 111 states have return successors, (472), 375 states have call predecessors, (472), 388 states have call successors, (472) [2022-12-14 15:54:22,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2683 transitions. [2022-12-14 15:54:22,325 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2683 transitions. Word has length 69 [2022-12-14 15:54:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:22,325 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2683 transitions. [2022-12-14 15:54:22,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 15:54:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2683 transitions. [2022-12-14 15:54:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 15:54:22,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:22,330 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, 1, 1] [2022-12-14 15:54:22,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:54:22,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1828789905, now seen corresponding path program 1 times [2022-12-14 15:54:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:22,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946147496] [2022-12-14 15:54:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:54:22,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:22,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946147496] [2022-12-14 15:54:22,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946147496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:22,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:54:22,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:54:22,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453555434] [2022-12-14 15:54:22,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:54:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:54:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:54:22,632 INFO L87 Difference]: Start difference. First operand 1673 states and 2683 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 15:54:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:23,416 INFO L93 Difference]: Finished difference Result 4466 states and 7499 transitions. [2022-12-14 15:54:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:54:23,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2022-12-14 15:54:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:23,432 INFO L225 Difference]: With dead ends: 4466 [2022-12-14 15:54:23,432 INFO L226 Difference]: Without dead ends: 2805 [2022-12-14 15:54:23,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:54:23,442 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 642 mSDsluCounter, 2547 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 3282 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:23,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 3282 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:54:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-12-14 15:54:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2429. [2022-12-14 15:54:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1700 states have (on average 1.5488235294117647) internal successors, (2633), 1786 states have internal predecessors, (2633), 564 states have call successors, (564), 153 states have call predecessors, (564), 164 states have return successors, (735), 533 states have call predecessors, (735), 556 states have call successors, (735) [2022-12-14 15:54:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3932 transitions. [2022-12-14 15:54:23,557 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3932 transitions. Word has length 70 [2022-12-14 15:54:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:23,558 INFO L495 AbstractCegarLoop]: Abstraction has 2429 states and 3932 transitions. [2022-12-14 15:54:23,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 15:54:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3932 transitions. [2022-12-14 15:54:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 15:54:23,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:23,560 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, 1, 1] [2022-12-14 15:54:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:54:23,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 746033987, now seen corresponding path program 1 times [2022-12-14 15:54:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:23,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093116577] [2022-12-14 15:54:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:23,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:54:23,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:23,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093116577] [2022-12-14 15:54:23,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093116577] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:23,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889418742] [2022-12-14 15:54:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:23,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:23,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:23,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:54:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:54:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:54:24,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:24,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889418742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:24,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:24,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:54:24,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429005873] [2022-12-14 15:54:24,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:24,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:54:24,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:54:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:54:24,078 INFO L87 Difference]: Start difference. First operand 2429 states and 3932 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:54:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:24,402 INFO L93 Difference]: Finished difference Result 5961 states and 9966 transitions. [2022-12-14 15:54:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:54:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-12-14 15:54:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:24,442 INFO L225 Difference]: With dead ends: 5961 [2022-12-14 15:54:24,442 INFO L226 Difference]: Without dead ends: 3544 [2022-12-14 15:54:24,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:54:24,470 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 553 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:24,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1138 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:54:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-12-14 15:54:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3399. [2022-12-14 15:54:24,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2393 states have (on average 1.5436690346844963) internal successors, (3694), 2523 states have internal predecessors, (3694), 772 states have call successors, (772), 210 states have call predecessors, (772), 233 states have return successors, (1044), 731 states have call predecessors, (1044), 764 states have call successors, (1044) [2022-12-14 15:54:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5510 transitions. [2022-12-14 15:54:24,730 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5510 transitions. Word has length 70 [2022-12-14 15:54:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:24,730 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5510 transitions. [2022-12-14 15:54:24,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:54:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5510 transitions. [2022-12-14 15:54:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 15:54:24,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:24,735 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, 1, 1, 1] [2022-12-14 15:54:24,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:54:24,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:24,936 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1620556643, now seen corresponding path program 1 times [2022-12-14 15:54:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:24,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991106447] [2022-12-14 15:54:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:24,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:54:25,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991106447] [2022-12-14 15:54:25,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991106447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920147030] [2022-12-14 15:54:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:25,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:25,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:25,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:25,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:54:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:54:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:54:25,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:25,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920147030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:25,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:25,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 15:54:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096297658] [2022-12-14 15:54:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:54:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:54:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:54:25,474 INFO L87 Difference]: Start difference. First operand 3399 states and 5510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 15:54:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:26,061 INFO L93 Difference]: Finished difference Result 8797 states and 14640 transitions. [2022-12-14 15:54:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:54:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-12-14 15:54:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:26,103 INFO L225 Difference]: With dead ends: 8797 [2022-12-14 15:54:26,103 INFO L226 Difference]: Without dead ends: 5410 [2022-12-14 15:54:26,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:54:26,132 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 498 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:26,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1819 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:54:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2022-12-14 15:54:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 5226. [2022-12-14 15:54:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 3685 states have (on average 1.5042062415196744) internal successors, (5543), 3905 states have internal predecessors, (5543), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-12-14 15:54:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 8298 transitions. [2022-12-14 15:54:26,503 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 8298 transitions. Word has length 71 [2022-12-14 15:54:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:26,504 INFO L495 AbstractCegarLoop]: Abstraction has 5226 states and 8298 transitions. [2022-12-14 15:54:26,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 15:54:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 8298 transitions. [2022-12-14 15:54:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 15:54:26,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:26,508 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, 1, 1, 1, 1, 1] [2022-12-14 15:54:26,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:54:26,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:26,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash -602728237, now seen corresponding path program 1 times [2022-12-14 15:54:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:26,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328282938] [2022-12-14 15:54:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:26,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:54:27,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:27,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328282938] [2022-12-14 15:54:27,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328282938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:27,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992444590] [2022-12-14 15:54:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:27,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:27,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:27,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:54:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:54:27,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:54:27,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:27,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992444590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:27,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:27,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 15:54:27,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693248034] [2022-12-14 15:54:27,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:27,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:54:27,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:27,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:54:27,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:54:27,536 INFO L87 Difference]: Start difference. First operand 5226 states and 8298 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 15:54:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:27,975 INFO L93 Difference]: Finished difference Result 10338 states and 16814 transitions. [2022-12-14 15:54:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:54:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2022-12-14 15:54:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:28,003 INFO L225 Difference]: With dead ends: 10338 [2022-12-14 15:54:28,004 INFO L226 Difference]: Without dead ends: 6291 [2022-12-14 15:54:28,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:54:28,020 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 117 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:28,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1752 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:54:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2022-12-14 15:54:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 5256. [2022-12-14 15:54:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 3715 states have (on average 1.5001345895020188) internal successors, (5573), 3935 states have internal predecessors, (5573), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-12-14 15:54:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 8328 transitions. [2022-12-14 15:54:28,257 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 8328 transitions. Word has length 80 [2022-12-14 15:54:28,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:28,257 INFO L495 AbstractCegarLoop]: Abstraction has 5256 states and 8328 transitions. [2022-12-14 15:54:28,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 15:54:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 8328 transitions. [2022-12-14 15:54:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 15:54:28,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:28,259 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:54:28,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:54:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 15:54:28,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1203869967, now seen corresponding path program 1 times [2022-12-14 15:54:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:28,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001438867] [2022-12-14 15:54:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:54:28,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001438867] [2022-12-14 15:54:28,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001438867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238342683] [2022-12-14 15:54:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:28,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:28,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:28,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:54:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:54:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:54:29,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:54:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:54:29,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238342683] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:29,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:54:29,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2022-12-14 15:54:29,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366753798] [2022-12-14 15:54:29,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:29,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:54:29,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:54:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:54:29,457 INFO L87 Difference]: Start difference. First operand 5256 states and 8328 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-12-14 15:54:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:31,038 INFO L93 Difference]: Finished difference Result 10919 states and 17521 transitions. [2022-12-14 15:54:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:54:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2022-12-14 15:54:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:31,074 INFO L225 Difference]: With dead ends: 10919 [2022-12-14 15:54:31,074 INFO L226 Difference]: Without dead ends: 6860 [2022-12-14 15:54:31,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:54:31,093 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1185 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:31,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 1608 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 15:54:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6860 states. [2022-12-14 15:54:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6860 to 5891. [2022-12-14 15:54:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 4170 states have (on average 1.484412470023981) internal successors, (6190), 4433 states have internal predecessors, (6190), 1312 states have call successors, (1312), 360 states have call predecessors, (1312), 408 states have return successors, (1825), 1200 states have call predecessors, (1825), 1301 states have call successors, (1825) [2022-12-14 15:54:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 9327 transitions. [2022-12-14 15:54:31,508 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 9327 transitions. Word has length 84 [2022-12-14 15:54:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:31,509 INFO L495 AbstractCegarLoop]: Abstraction has 5891 states and 9327 transitions. [2022-12-14 15:54:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-12-14 15:54:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 9327 transitions. [2022-12-14 15:54:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 15:54:31,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:31,513 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:54:31,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:54:31,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 15:54:31,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1229501915, now seen corresponding path program 1 times [2022-12-14 15:54:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:31,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946149202] [2022-12-14 15:54:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:54:32,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:32,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946149202] [2022-12-14 15:54:32,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946149202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236488268] [2022-12-14 15:54:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:32,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:32,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:32,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:54:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:54:32,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:54:32,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:54:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 15:54:32,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236488268] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:32,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:54:32,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-12-14 15:54:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606369875] [2022-12-14 15:54:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:54:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:54:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:54:32,929 INFO L87 Difference]: Start difference. First operand 5891 states and 9327 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 15:54:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:36,422 INFO L93 Difference]: Finished difference Result 17211 states and 30127 transitions. [2022-12-14 15:54:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:54:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-12-14 15:54:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:36,483 INFO L225 Difference]: With dead ends: 17211 [2022-12-14 15:54:36,483 INFO L226 Difference]: Without dead ends: 12955 [2022-12-14 15:54:36,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 15:54:36,512 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 2628 mSDsluCounter, 2667 mSDsCounter, 0 mSdLazyCounter, 3217 mSolverCounterSat, 1252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2717 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1252 IncrementalHoareTripleChecker+Valid, 3217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:36,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2717 Valid, 3340 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1252 Valid, 3217 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 15:54:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12955 states. [2022-12-14 15:54:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12955 to 11319. [2022-12-14 15:54:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4153), 2201 states have call predecessors, (4153), 2349 states have call successors, (4153) [2022-12-14 15:54:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18667 transitions. [2022-12-14 15:54:37,300 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18667 transitions. Word has length 87 [2022-12-14 15:54:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:37,300 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18667 transitions. [2022-12-14 15:54:37,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 15:54:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18667 transitions. [2022-12-14 15:54:37,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 15:54:37,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:37,306 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 15:54:37,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 15:54:37,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:37,507 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash -162001538, now seen corresponding path program 1 times [2022-12-14 15:54:37,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:37,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716530726] [2022-12-14 15:54:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:37,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:54:37,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:37,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716530726] [2022-12-14 15:54:37,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716530726] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:37,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569456500] [2022-12-14 15:54:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:37,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:37,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:37,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:37,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:54:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:54:38,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:54:38,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:54:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:54:38,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569456500] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:38,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:54:38,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-12-14 15:54:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837923964] [2022-12-14 15:54:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:54:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:54:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:54:38,380 INFO L87 Difference]: Start difference. First operand 11319 states and 18667 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 15:54:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:40,079 INFO L93 Difference]: Finished difference Result 22566 states and 37839 transitions. [2022-12-14 15:54:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:54:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-12-14 15:54:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:40,130 INFO L225 Difference]: With dead ends: 22566 [2022-12-14 15:54:40,130 INFO L226 Difference]: Without dead ends: 12882 [2022-12-14 15:54:40,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:54:40,160 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 924 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:40,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 2003 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:54:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12882 states. [2022-12-14 15:54:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12882 to 11319. [2022-12-14 15:54:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4141), 2201 states have call predecessors, (4141), 2349 states have call successors, (4141) [2022-12-14 15:54:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18655 transitions. [2022-12-14 15:54:40,803 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18655 transitions. Word has length 91 [2022-12-14 15:54:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:40,804 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18655 transitions. [2022-12-14 15:54:40,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 15:54:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18655 transitions. [2022-12-14 15:54:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 15:54:40,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:40,807 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:54:40,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:54:41,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:41,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1712840433, now seen corresponding path program 1 times [2022-12-14 15:54:41,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:41,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361251255] [2022-12-14 15:54:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:41,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:54:41,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361251255] [2022-12-14 15:54:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361251255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:41,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8279811] [2022-12-14 15:54:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:41,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:41,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:41,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:54:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:41,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:54:41,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:54:41,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:41,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8279811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:41,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:41,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 15:54:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134560401] [2022-12-14 15:54:41,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:41,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:54:41,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:54:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:54:41,553 INFO L87 Difference]: Start difference. First operand 11319 states and 18655 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:54:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:42,560 INFO L93 Difference]: Finished difference Result 21798 states and 37277 transitions. [2022-12-14 15:54:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:54:42,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2022-12-14 15:54:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:42,601 INFO L225 Difference]: With dead ends: 21798 [2022-12-14 15:54:42,601 INFO L226 Difference]: Without dead ends: 11694 [2022-12-14 15:54:42,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:54:42,637 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 2 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:42,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2262 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:54:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2022-12-14 15:54:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 11541. [2022-12-14 15:54:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11541 states, 8291 states have (on average 1.483295139307683) internal successors, (12298), 8779 states have internal predecessors, (12298), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 883 states have return successors, (4623), 2240 states have call predecessors, (4623), 2349 states have call successors, (4623) [2022-12-14 15:54:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11541 states to 11541 states and 19287 transitions. [2022-12-14 15:54:43,403 INFO L78 Accepts]: Start accepts. Automaton has 11541 states and 19287 transitions. Word has length 111 [2022-12-14 15:54:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:43,403 INFO L495 AbstractCegarLoop]: Abstraction has 11541 states and 19287 transitions. [2022-12-14 15:54:43,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:54:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 11541 states and 19287 transitions. [2022-12-14 15:54:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 15:54:43,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:43,408 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:54:43,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:54:43,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:43,609 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1839978000, now seen corresponding path program 1 times [2022-12-14 15:54:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347333640] [2022-12-14 15:54:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:54:43,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:43,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347333640] [2022-12-14 15:54:43,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347333640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:43,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578637682] [2022-12-14 15:54:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:43,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:43,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:43,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:54:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:54:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:54:44,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:44,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578637682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:44,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:44,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 15:54:44,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107737359] [2022-12-14 15:54:44,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:54:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:44,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:54:44,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:54:44,243 INFO L87 Difference]: Start difference. First operand 11541 states and 19287 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:54:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:45,174 INFO L93 Difference]: Finished difference Result 23853 states and 41402 transitions. [2022-12-14 15:54:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:54:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2022-12-14 15:54:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:45,219 INFO L225 Difference]: With dead ends: 23853 [2022-12-14 15:54:45,219 INFO L226 Difference]: Without dead ends: 11188 [2022-12-14 15:54:45,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:54:45,266 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 241 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:45,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1585 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:54:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11188 states. [2022-12-14 15:54:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11188 to 11155. [2022-12-14 15:54:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.452562977816769) internal successors, (11590), 8457 states have internal predecessors, (11590), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-12-14 15:54:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18322 transitions. [2022-12-14 15:54:45,840 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18322 transitions. Word has length 122 [2022-12-14 15:54:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:45,841 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18322 transitions. [2022-12-14 15:54:45,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:54:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18322 transitions. [2022-12-14 15:54:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 15:54:45,846 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:45,846 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:54:45,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:54:46,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:54:46,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1991235296, now seen corresponding path program 1 times [2022-12-14 15:54:46,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:46,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095415452] [2022-12-14 15:54:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:46,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:54:46,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:46,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095415452] [2022-12-14 15:54:46,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095415452] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:46,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014837005] [2022-12-14 15:54:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:46,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:46,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:54:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:46,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:54:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:54:46,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:46,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014837005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:46,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:46,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 15:54:46,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269142704] [2022-12-14 15:54:46,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:46,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:54:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:54:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:54:46,727 INFO L87 Difference]: Start difference. First operand 11155 states and 18322 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:54:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:47,484 INFO L93 Difference]: Finished difference Result 23289 states and 39619 transitions. [2022-12-14 15:54:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:54:47,484 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), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2022-12-14 15:54:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:47,522 INFO L225 Difference]: With dead ends: 23289 [2022-12-14 15:54:47,522 INFO L226 Difference]: Without dead ends: 11155 [2022-12-14 15:54:47,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:54:47,563 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 236 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:47,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1557 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:54:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11155 states. [2022-12-14 15:54:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11155 to 11155. [2022-12-14 15:54:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.4167188870785812) internal successors, (11304), 8457 states have internal predecessors, (11304), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-12-14 15:54:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18036 transitions. [2022-12-14 15:54:48,229 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18036 transitions. Word has length 126 [2022-12-14 15:54:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:48,229 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18036 transitions. [2022-12-14 15:54:48,229 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), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:54:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18036 transitions. [2022-12-14 15:54:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 15:54:48,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:48,238 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, 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] [2022-12-14 15:54:48,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:54:48,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:48,439 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash 606396233, now seen corresponding path program 1 times [2022-12-14 15:54:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:48,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251973780] [2022-12-14 15:54:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 15:54:48,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:48,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251973780] [2022-12-14 15:54:48,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251973780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:48,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861592379] [2022-12-14 15:54:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:48,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:48,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:48,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:48,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:54:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:54:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:54:49,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:49,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861592379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:49,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:49,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 15:54:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773522665] [2022-12-14 15:54:49,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:54:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:54:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:54:49,061 INFO L87 Difference]: Start difference. First operand 11155 states and 18036 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 15:54:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:51,521 INFO L93 Difference]: Finished difference Result 24266 states and 40023 transitions. [2022-12-14 15:54:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:54:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 129 [2022-12-14 15:54:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:51,595 INFO L225 Difference]: With dead ends: 24266 [2022-12-14 15:54:51,595 INFO L226 Difference]: Without dead ends: 13081 [2022-12-14 15:54:51,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-14 15:54:51,648 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 1132 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 3352 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 3352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:54:51,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1215 Valid, 1452 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 3352 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 15:54:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13081 states. [2022-12-14 15:54:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13081 to 11140. [2022-12-14 15:54:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11140 states, 7964 states have (on average 1.4171270718232045) internal successors, (11286), 8442 states have internal predecessors, (11286), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-12-14 15:54:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11140 states to 11140 states and 18018 transitions. [2022-12-14 15:54:52,350 INFO L78 Accepts]: Start accepts. Automaton has 11140 states and 18018 transitions. Word has length 129 [2022-12-14 15:54:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:52,350 INFO L495 AbstractCegarLoop]: Abstraction has 11140 states and 18018 transitions. [2022-12-14 15:54:52,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 15:54:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 11140 states and 18018 transitions. [2022-12-14 15:54:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 15:54:52,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:52,355 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:54:52,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:54:52,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:54:52,556 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:52,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2121507266, now seen corresponding path program 1 times [2022-12-14 15:54:52,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:52,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666998730] [2022-12-14 15:54:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:52,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 15:54:52,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666998730] [2022-12-14 15:54:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666998730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626967105] [2022-12-14 15:54:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:52,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:52,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:52,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:52,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:54:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:54:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 15:54:53,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:54:53,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626967105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:54:53,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:54:53,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-12-14 15:54:53,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478535185] [2022-12-14 15:54:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:53,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:54:53,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:54:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:54:53,225 INFO L87 Difference]: Start difference. First operand 11140 states and 18018 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 15:54:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:54,178 INFO L93 Difference]: Finished difference Result 26182 states and 43889 transitions. [2022-12-14 15:54:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:54:54,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 136 [2022-12-14 15:54:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:54:54,278 INFO L225 Difference]: With dead ends: 26182 [2022-12-14 15:54:54,278 INFO L226 Difference]: Without dead ends: 15054 [2022-12-14 15:54:54,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:54:54,330 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 462 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1325 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 [2022-12-14 15:54:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1325 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:54:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2022-12-14 15:54:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14738. [2022-12-14 15:54:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 10553 states have (on average 1.4159954515303705) internal successors, (14943), 11212 states have internal predecessors, (14943), 3035 states have call successors, (3035), 873 states have call predecessors, (3035), 1149 states have return successors, (5986), 2872 states have call predecessors, (5986), 3018 states have call successors, (5986) [2022-12-14 15:54:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 23964 transitions. [2022-12-14 15:54:55,427 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 23964 transitions. Word has length 136 [2022-12-14 15:54:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:54:55,428 INFO L495 AbstractCegarLoop]: Abstraction has 14738 states and 23964 transitions. [2022-12-14 15:54:55,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 15:54:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 23964 transitions. [2022-12-14 15:54:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 15:54:55,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:54:55,434 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:54:55,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:54:55,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:54:55,635 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:54:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:54:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 343949920, now seen corresponding path program 1 times [2022-12-14 15:54:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:54:55,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830723430] [2022-12-14 15:54:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:54:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 15:54:56,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:54:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830723430] [2022-12-14 15:54:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830723430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168316499] [2022-12-14 15:54:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:54:56,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:54:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:54:56,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:54:56,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:54:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:54:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:54:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:54:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:54:56,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:54:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:54:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168316499] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:54:56,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:54:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 19 [2022-12-14 15:54:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712656068] [2022-12-14 15:54:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:54:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:54:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:54:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:54:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:54:56,609 INFO L87 Difference]: Start difference. First operand 14738 states and 23964 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-12-14 15:54:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:54:59,991 INFO L93 Difference]: Finished difference Result 38197 states and 67453 transitions. [2022-12-14 15:54:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:54:59,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 141 [2022-12-14 15:54:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:55:00,105 INFO L225 Difference]: With dead ends: 38197 [2022-12-14 15:55:00,105 INFO L226 Difference]: Without dead ends: 25677 [2022-12-14 15:55:00,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:55:00,172 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 1939 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2010 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:55:00,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2010 Valid, 2012 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 2861 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 15:55:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2022-12-14 15:55:01,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 22811. [2022-12-14 15:55:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22811 states, 16183 states have (on average 1.4181548538589879) internal successors, (22950), 17233 states have internal predecessors, (22950), 4810 states have call successors, (4810), 1445 states have call predecessors, (4810), 1817 states have return successors, (9505), 4512 states have call predecessors, (9505), 4784 states have call successors, (9505) [2022-12-14 15:55:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22811 states to 22811 states and 37265 transitions. [2022-12-14 15:55:01,836 INFO L78 Accepts]: Start accepts. Automaton has 22811 states and 37265 transitions. Word has length 141 [2022-12-14 15:55:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:55:01,836 INFO L495 AbstractCegarLoop]: Abstraction has 22811 states and 37265 transitions. [2022-12-14 15:55:01,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-12-14 15:55:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 22811 states and 37265 transitions. [2022-12-14 15:55:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 15:55:01,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:55:01,844 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 15:55:01,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:55:02,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:02,045 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:55:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:55:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash 358866062, now seen corresponding path program 1 times [2022-12-14 15:55:02,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:55:02,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883913097] [2022-12-14 15:55:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:55:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 15:55:02,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:55:02,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883913097] [2022-12-14 15:55:02,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883913097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:55:02,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722499703] [2022-12-14 15:55:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:02,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:02,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:55:02,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:55:02,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:55:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:55:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:55:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 15:55:02,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:55:02,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722499703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:55:02,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:55:02,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-12-14 15:55:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375661380] [2022-12-14 15:55:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:55:02,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:55:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:55:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:55:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:55:02,783 INFO L87 Difference]: Start difference. First operand 22811 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-12-14 15:55:04,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:55:04,357 INFO L93 Difference]: Finished difference Result 44525 states and 74855 transitions. [2022-12-14 15:55:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:55:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 [2022-12-14 15:55:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:55:04,456 INFO L225 Difference]: With dead ends: 44525 [2022-12-14 15:55:04,456 INFO L226 Difference]: Without dead ends: 23926 [2022-12-14 15:55:04,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:55:04,553 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 33 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:55:04,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1101 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:55:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23926 states. [2022-12-14 15:55:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23926 to 23250. [2022-12-14 15:55:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23250 states, 16537 states have (on average 1.4135574771724013) internal successors, (23376), 17606 states have internal predecessors, (23376), 4884 states have call successors, (4884), 1442 states have call predecessors, (4884), 1828 states have return successors, (9563), 4585 states have call predecessors, (9563), 4858 states have call successors, (9563) [2022-12-14 15:55:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23250 states to 23250 states and 37823 transitions. [2022-12-14 15:55:06,034 INFO L78 Accepts]: Start accepts. Automaton has 23250 states and 37823 transitions. Word has length 142 [2022-12-14 15:55:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:55:06,034 INFO L495 AbstractCegarLoop]: Abstraction has 23250 states and 37823 transitions. [2022-12-14 15:55:06,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-12-14 15:55:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 23250 states and 37823 transitions. [2022-12-14 15:55:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 15:55:06,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:55:06,042 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:55:06,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 15:55:06,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:55:06,243 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:55:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:55:06,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1895698105, now seen corresponding path program 1 times [2022-12-14 15:55:06,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:55:06,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058784267] [2022-12-14 15:55:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:06,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:55:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 15:55:06,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:55:06,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058784267] [2022-12-14 15:55:06,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058784267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:55:06,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754375232] [2022-12-14 15:55:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:06,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:55:06,811 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:55:06,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:55:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:55:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:55:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:55:07,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:55:07,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754375232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:55:07,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:55:07,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-12-14 15:55:07,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240274283] [2022-12-14 15:55:07,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:55:07,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 15:55:07,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:55:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 15:55:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:55:07,257 INFO L87 Difference]: Start difference. First operand 23250 states and 37823 transitions. Second operand has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 15:55:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:55:10,570 INFO L93 Difference]: Finished difference Result 58803 states and 97446 transitions. [2022-12-14 15:55:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:55:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-12-14 15:55:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:55:10,707 INFO L225 Difference]: With dead ends: 58803 [2022-12-14 15:55:10,707 INFO L226 Difference]: Without dead ends: 37765 [2022-12-14 15:55:10,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:55:10,797 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 580 mSDsluCounter, 3697 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 4384 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:55:10,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 4384 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:55:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37765 states. [2022-12-14 15:55:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37765 to 36013. [2022-12-14 15:55:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36013 states, 25636 states have (on average 1.4200343267280386) internal successors, (36404), 27341 states have internal predecessors, (36404), 7567 states have call successors, (7567), 2267 states have call predecessors, (7567), 2809 states have return successors, (15577), 7024 states have call predecessors, (15577), 7523 states have call successors, (15577) [2022-12-14 15:55:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36013 states to 36013 states and 59548 transitions. [2022-12-14 15:55:13,276 INFO L78 Accepts]: Start accepts. Automaton has 36013 states and 59548 transitions. Word has length 142 [2022-12-14 15:55:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:55:13,277 INFO L495 AbstractCegarLoop]: Abstraction has 36013 states and 59548 transitions. [2022-12-14 15:55:13,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 15:55:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 36013 states and 59548 transitions. [2022-12-14 15:55:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:55:13,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:55:13,289 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 15:55:13,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 15:55:13,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:55:13,491 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:55:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:55:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1580113941, now seen corresponding path program 1 times [2022-12-14 15:55:13,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:55:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48469778] [2022-12-14 15:55:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:55:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 15:55:14,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:55:14,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48469778] [2022-12-14 15:55:14,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48469778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:55:14,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298093056] [2022-12-14 15:55:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:14,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:14,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:55:14,049 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:55:14,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:55:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:55:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:55:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:55:14,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:55:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 15:55:14,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298093056] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:55:14,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:55:14,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 20 [2022-12-14 15:55:14,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154342680] [2022-12-14 15:55:14,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:55:14,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:55:14,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:55:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:55:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:55:14,644 INFO L87 Difference]: Start difference. First operand 36013 states and 59548 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-12-14 15:55:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:55:19,973 INFO L93 Difference]: Finished difference Result 85422 states and 150581 transitions. [2022-12-14 15:55:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:55:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 146 [2022-12-14 15:55:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:55:20,232 INFO L225 Difference]: With dead ends: 85422 [2022-12-14 15:55:20,232 INFO L226 Difference]: Without dead ends: 51683 [2022-12-14 15:55:20,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:55:20,475 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1467 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:55:20,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1536 Valid, 1624 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 15:55:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2022-12-14 15:55:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 43351. [2022-12-14 15:55:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43351 states, 30055 states have (on average 1.4144401929795376) internal successors, (42511), 32171 states have internal predecessors, (42511), 9824 states have call successors, (9824), 3054 states have call predecessors, (9824), 3471 states have return successors, (18612), 9091 states have call predecessors, (18612), 9754 states have call successors, (18612) [2022-12-14 15:55:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43351 states to 43351 states and 70947 transitions. [2022-12-14 15:55:24,050 INFO L78 Accepts]: Start accepts. Automaton has 43351 states and 70947 transitions. Word has length 146 [2022-12-14 15:55:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:55:24,050 INFO L495 AbstractCegarLoop]: Abstraction has 43351 states and 70947 transitions. [2022-12-14 15:55:24,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-12-14 15:55:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand 43351 states and 70947 transitions. [2022-12-14 15:55:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:55:24,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:55:24,059 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, 1, 1, 1, 1, 1, 1] [2022-12-14 15:55:24,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 15:55:24,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:24,261 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:55:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:55:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash -22824400, now seen corresponding path program 1 times [2022-12-14 15:55:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:55:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645802653] [2022-12-14 15:55:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:55:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:55:24,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:55:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645802653] [2022-12-14 15:55:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645802653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:55:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886650990] [2022-12-14 15:55:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:55:24,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:55:24,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 15:55:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1945 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:55:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:55:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 15:55:25,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:55:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886650990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:55:25,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:55:25,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-12-14 15:55:25,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019355187] [2022-12-14 15:55:25,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:55:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:55:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:55:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:55:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:55:25,058 INFO L87 Difference]: Start difference. First operand 43351 states and 70947 transitions. Second operand has 6 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 15:55:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:55:31,668 INFO L93 Difference]: Finished difference Result 119211 states and 208397 transitions. [2022-12-14 15:55:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:55:31,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 146 [2022-12-14 15:55:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:55:32,034 INFO L225 Difference]: With dead ends: 119211 [2022-12-14 15:55:32,034 INFO L226 Difference]: Without dead ends: 75821 [2022-12-14 15:55:32,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:55:32,386 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 598 mSDsluCounter, 2297 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:55:32,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 3004 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:55:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75821 states. [2022-12-14 15:55:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75821 to 71104. [2022-12-14 15:55:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71104 states, 49461 states have (on average 1.4133964133357595) internal successors, (69908), 53243 states have internal predecessors, (69908), 15867 states have call successors, (15867), 5046 states have call predecessors, (15867), 5775 states have return successors, (32046), 14420 states have call predecessors, (32046), 15783 states have call successors, (32046) [2022-12-14 15:55:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71104 states to 71104 states and 117821 transitions. [2022-12-14 15:55:38,254 INFO L78 Accepts]: Start accepts. Automaton has 71104 states and 117821 transitions. Word has length 146 [2022-12-14 15:55:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:55:38,254 INFO L495 AbstractCegarLoop]: Abstraction has 71104 states and 117821 transitions. [2022-12-14 15:55:38,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 15:55:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 71104 states and 117821 transitions. [2022-12-14 15:55:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:55:38,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:55:38,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:55:38,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 15:55:38,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:38,464 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:55:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:55:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash 521006202, now seen corresponding path program 1 times [2022-12-14 15:55:38,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:55:38,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709996285] [2022-12-14 15:55:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:55:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 15:55:39,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:55:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709996285] [2022-12-14 15:55:39,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709996285] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:55:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420012505] [2022-12-14 15:55:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:55:39,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:55:39,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:55:39,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:55:39,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 15:55:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:55:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 2381 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:55:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:55:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 15:55:39,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:55:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 15:55:39,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420012505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:55:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173479383] [2022-12-14 15:55:39,782 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-12-14 15:55:39,782 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:55:39,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:55:39,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:55:39,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:55:46,119 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 15:55:53,378 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 15:55:53,381 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 15:55:55,471 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 15:55:55,654 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__weight with input of size 50 for LOIs [2022-12-14 15:55:55,987 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 50 for LOIs [2022-12-14 15:55:56,078 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 60 for LOIs [2022-12-14 15:55:56,090 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-12-14 15:55:56,102 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 44 for LOIs [2022-12-14 15:55:56,112 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 77 for LOIs [2022-12-14 15:55:56,118 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 15:55:59,237 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 15:55:59,800 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 15:55:59,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:57:06,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1213678#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 15:57:06,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:57:06,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:57:06,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 32 [2022-12-14 15:57:06,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416394010] [2022-12-14 15:57:06,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:57:06,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 15:57:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 15:57:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=11685, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 15:57:06,221 INFO L87 Difference]: Start difference. First operand 71104 states and 117821 transitions. Second operand has 32 states, 24 states have (on average 6.583333333333333) internal successors, (158), 28 states have internal predecessors, (158), 14 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) [2022-12-14 15:57:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:32,143 INFO L93 Difference]: Finished difference Result 178680 states and 347337 transitions. [2022-12-14 15:57:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-12-14 15:57:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 6.583333333333333) internal successors, (158), 28 states have internal predecessors, (158), 14 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) Word has length 150 [2022-12-14 15:57:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:32,804 INFO L225 Difference]: With dead ends: 178680 [2022-12-14 15:57:32,804 INFO L226 Difference]: Without dead ends: 109974 [2022-12-14 15:57:33,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 399 SyntacticMatches, 7 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20674 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=3753, Invalid=48003, Unknown=0, NotChecked=0, Total=51756 [2022-12-14 15:57:33,909 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 8710 mSDsluCounter, 10168 mSDsCounter, 0 mSdLazyCounter, 25380 mSolverCounterSat, 5483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8710 SdHoareTripleChecker+Valid, 11078 SdHoareTripleChecker+Invalid, 30863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5483 IncrementalHoareTripleChecker+Valid, 25380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:33,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8710 Valid, 11078 Invalid, 30863 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5483 Valid, 25380 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-12-14 15:57:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109974 states. [2022-12-14 15:57:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109974 to 81004. [2022-12-14 15:57:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81004 states, 55826 states have (on average 1.4157919249095403) internal successors, (79038), 59740 states have internal predecessors, (79038), 18535 states have call successors, (18535), 6168 states have call predecessors, (18535), 6642 states have return successors, (34364), 17035 states have call predecessors, (34364), 18383 states have call successors, (34364) [2022-12-14 15:57:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81004 states to 81004 states and 131937 transitions. [2022-12-14 15:57:43,435 INFO L78 Accepts]: Start accepts. Automaton has 81004 states and 131937 transitions. Word has length 150 [2022-12-14 15:57:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:43,436 INFO L495 AbstractCegarLoop]: Abstraction has 81004 states and 131937 transitions. [2022-12-14 15:57:43,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 6.583333333333333) internal successors, (158), 28 states have internal predecessors, (158), 14 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) [2022-12-14 15:57:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 81004 states and 131937 transitions. [2022-12-14 15:57:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 15:57:43,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:43,446 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, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:43,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 15:57:43,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:43,647 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2090286687, now seen corresponding path program 1 times [2022-12-14 15:57:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:43,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068098282] [2022-12-14 15:57:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:43,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:57:43,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068098282] [2022-12-14 15:57:43,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068098282] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:43,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:43,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:57:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725559473] [2022-12-14 15:57:43,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:57:43,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:57:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:57:43,795 INFO L87 Difference]: Start difference. First operand 81004 states and 131937 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 15:57:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:51,446 INFO L93 Difference]: Finished difference Result 157416 states and 264354 transitions. [2022-12-14 15:57:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:57:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 152 [2022-12-14 15:57:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:51,908 INFO L225 Difference]: With dead ends: 157416 [2022-12-14 15:57:51,908 INFO L226 Difference]: Without dead ends: 81372 [2022-12-14 15:57:52,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:57:52,761 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 2 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:52,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2190 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81372 states. [2022-12-14 15:57:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81372 to 80111. [2022-12-14 15:57:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80111 states, 55183 states have (on average 1.415961437399199) internal successors, (78137), 59042 states have internal predecessors, (78137), 18286 states have call successors, (18286), 6103 states have call predecessors, (18286), 6641 states have return successors, (34062), 16905 states have call predecessors, (34062), 18134 states have call successors, (34062) [2022-12-14 15:58:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80111 states to 80111 states and 130485 transitions. [2022-12-14 15:58:00,155 INFO L78 Accepts]: Start accepts. Automaton has 80111 states and 130485 transitions. Word has length 152 [2022-12-14 15:58:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:00,156 INFO L495 AbstractCegarLoop]: Abstraction has 80111 states and 130485 transitions. [2022-12-14 15:58:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 15:58:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 80111 states and 130485 transitions. [2022-12-14 15:58:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 15:58:00,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:00,164 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:00,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 15:58:00,164 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:58:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash -899797444, now seen corresponding path program 1 times [2022-12-14 15:58:00,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:58:00,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304558187] [2022-12-14 15:58:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:00,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:58:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 15:58:01,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304558187] [2022-12-14 15:58:01,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304558187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925984366] [2022-12-14 15:58:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:01,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:01,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:01,075 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:01,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 15:58:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2417 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:58:01,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:58:01,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:58:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 15:58:01,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925984366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:58:01,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614484613] [2022-12-14 15:58:01,671 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-12-14 15:58:01,671 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:58:01,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:58:01,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:58:01,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:58:07,722 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 15:58:14,283 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 15:58:14,284 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 15:58:16,228 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 15:58:16,441 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__weight with input of size 68 for LOIs [2022-12-14 15:58:16,853 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 50 for LOIs [2022-12-14 15:58:17,276 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 47 for LOIs [2022-12-14 15:58:17,279 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 42 for LOIs [2022-12-14 15:58:17,291 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 68 for LOIs [2022-12-14 15:58:17,307 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2022-12-14 15:58:17,318 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 77 for LOIs [2022-12-14 15:58:17,325 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 15:58:20,501 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 15:58:21,111 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 15:58:21,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:59:28,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1912159#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 15:59:28,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:59:28,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:59:28,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10, 10] total 36 [2022-12-14 15:59:28,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139739427] [2022-12-14 15:59:28,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:59:28,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 15:59:28,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 15:59:28,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=14661, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 15:59:28,148 INFO L87 Difference]: Start difference. First operand 80111 states and 130485 transitions. Second operand has 36 states, 28 states have (on average 6.142857142857143) internal successors, (172), 31 states have internal predecessors, (172), 15 states have call successors, (56), 8 states have call predecessors, (56), 16 states have return successors, (55), 19 states have call predecessors, (55), 15 states have call successors, (55) [2022-12-14 15:59:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:55,793 INFO L93 Difference]: Finished difference Result 199638 states and 347600 transitions. [2022-12-14 15:59:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-14 15:59:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 6.142857142857143) internal successors, (172), 31 states have internal predecessors, (172), 15 states have call successors, (56), 8 states have call predecessors, (56), 16 states have return successors, (55), 19 states have call predecessors, (55), 15 states have call successors, (55) Word has length 163 [2022-12-14 15:59:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:56,673 INFO L225 Difference]: With dead ends: 199638 [2022-12-14 15:59:56,673 INFO L226 Difference]: Without dead ends: 122832 [2022-12-14 15:59:57,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 424 SyntacticMatches, 9 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21524 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=3205, Invalid=50387, Unknown=0, NotChecked=0, Total=53592 [2022-12-14 15:59:57,477 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 7733 mSDsluCounter, 10010 mSDsCounter, 0 mSdLazyCounter, 30602 mSolverCounterSat, 4523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7733 SdHoareTripleChecker+Valid, 10660 SdHoareTripleChecker+Invalid, 35125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4523 IncrementalHoareTripleChecker+Valid, 30602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:57,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7733 Valid, 10660 Invalid, 35125 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4523 Valid, 30602 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-12-14 15:59:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122832 states. [2022-12-14 16:00:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122832 to 113580. [2022-12-14 16:00:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113580 states, 78622 states have (on average 1.4139172241866145) internal successors, (111165), 83968 states have internal predecessors, (111165), 25653 states have call successors, (25653), 8520 states have call predecessors, (25653), 9304 states have return successors, (52905), 23887 states have call predecessors, (52905), 25454 states have call successors, (52905) [2022-12-14 16:00:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113580 states to 113580 states and 189723 transitions. [2022-12-14 16:00:10,181 INFO L78 Accepts]: Start accepts. Automaton has 113580 states and 189723 transitions. Word has length 163 [2022-12-14 16:00:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:10,181 INFO L495 AbstractCegarLoop]: Abstraction has 113580 states and 189723 transitions. [2022-12-14 16:00:10,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 6.142857142857143) internal successors, (172), 31 states have internal predecessors, (172), 15 states have call successors, (56), 8 states have call predecessors, (56), 16 states have return successors, (55), 19 states have call predecessors, (55), 15 states have call successors, (55) [2022-12-14 16:00:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 113580 states and 189723 transitions. [2022-12-14 16:00:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 16:00:10,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:10,186 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:10,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 16:00:10,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 16:00:10,388 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1563621485, now seen corresponding path program 1 times [2022-12-14 16:00:10,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:10,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707630728] [2022-12-14 16:00:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:10,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 16:00:10,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707630728] [2022-12-14 16:00:10,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707630728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:00:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479196502] [2022-12-14 16:00:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:10,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:10,679 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:10,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 16:00:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:10,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 16:00:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 82 proven. 20 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-14 16:00:11,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:00:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 16:00:11,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479196502] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:00:11,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825548861] [2022-12-14 16:00:11,590 INFO L159 IcfgInterpreter]: Started Sifa with 177 locations of interest [2022-12-14 16:00:11,590 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:00:11,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:00:11,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:00:11,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:00:16,168 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2022-12-14 16:00:23,224 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 16:00:25,192 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 16:00:25,383 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 62 for LOIs [2022-12-14 16:00:25,393 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 443 for LOIs [2022-12-14 16:00:25,462 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 16:00:28,621 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 16:00:29,182 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 16:00:29,318 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:00:50,267 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:01:49,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [825548861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:49,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:01:49,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [8, 9, 8] total 47 [2022-12-14 16:01:49,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262433610] [2022-12-14 16:01:49,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:49,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 16:01:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:01:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 16:01:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1860, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 16:01:49,445 INFO L87 Difference]: Start difference. First operand 113580 states and 189723 transitions. Second operand has 29 states, 22 states have (on average 5.909090909090909) internal successors, (130), 16 states have internal predecessors, (130), 11 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2022-12-14 16:02:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:49,194 INFO L93 Difference]: Finished difference Result 227274 states and 379629 transitions. [2022-12-14 16:02:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 16:02:49,195 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 5.909090909090909) internal successors, (130), 16 states have internal predecessors, (130), 11 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) Word has length 270 [2022-12-14 16:02:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:49,993 INFO L225 Difference]: With dead ends: 227274 [2022-12-14 16:02:49,994 INFO L226 Difference]: Without dead ends: 113706 [2022-12-14 16:02:50,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 756 SyntacticMatches, 17 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 97.1s TimeCoverageRelationStatistics Valid=355, Invalid=2297, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 16:02:50,975 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 130 mSDsluCounter, 3769 mSDsCounter, 0 mSdLazyCounter, 7154 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 4312 SdHoareTripleChecker+Invalid, 7189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 7154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:50,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 4312 Invalid, 7189 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 7154 Invalid, 0 Unknown, 0 Unchecked, 29.5s Time] [2022-12-14 16:02:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113706 states. [2022-12-14 16:03:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113706 to 113627. [2022-12-14 16:03:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113627 states, 78658 states have (on average 1.4137659233644384) internal successors, (111204), 84003 states have internal predecessors, (111204), 25660 states have call successors, (25660), 8526 states have call predecessors, (25660), 9308 states have return successors, (52912), 23893 states have call predecessors, (52912), 25461 states have call successors, (52912) [2022-12-14 16:03:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113627 states to 113627 states and 189776 transitions. [2022-12-14 16:03:04,307 INFO L78 Accepts]: Start accepts. Automaton has 113627 states and 189776 transitions. Word has length 270 [2022-12-14 16:03:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:04,308 INFO L495 AbstractCegarLoop]: Abstraction has 113627 states and 189776 transitions. [2022-12-14 16:03:04,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 5.909090909090909) internal successors, (130), 16 states have internal predecessors, (130), 11 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2022-12-14 16:03:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 113627 states and 189776 transitions. [2022-12-14 16:03:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-12-14 16:03:04,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:04,313 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:04,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 16:03:04,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 16:03:04,515 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1734017357, now seen corresponding path program 1 times [2022-12-14 16:03:04,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:04,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966911923] [2022-12-14 16:03:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 16:03:04,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:04,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966911923] [2022-12-14 16:03:04,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966911923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:04,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284388491] [2022-12-14 16:03:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:04,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:04,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:04,805 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:04,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 16:03:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:05,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 16:03:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 81 proven. 20 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 16:03:05,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 16:03:05,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284388491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602527025] [2022-12-14 16:03:05,743 INFO L159 IcfgInterpreter]: Started Sifa with 182 locations of interest [2022-12-14 16:03:05,743 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:03:05,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:03:05,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:03:05,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:03:10,552 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2022-12-14 16:03:21,190 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 16:03:23,139 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 16:03:23,327 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__weight with input of size 577 for LOIs [2022-12-14 16:03:24,441 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 445 for LOIs [2022-12-14 16:03:24,536 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 72 for LOIs [2022-12-14 16:03:24,546 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 62 for LOIs [2022-12-14 16:03:24,557 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 443 for LOIs [2022-12-14 16:03:24,626 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 16:03:27,816 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 16:03:28,378 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 16:03:28,514 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:05:13,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1602527025] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:05:13,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:05:13,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 8] total 60 [2022-12-14 16:05:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347806837] [2022-12-14 16:05:13,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:05:13,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 16:05:13,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:05:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 16:05:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3090, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 16:05:13,439 INFO L87 Difference]: Start difference. First operand 113627 states and 189776 transitions. Second operand has 42 states, 33 states have (on average 4.090909090909091) internal successors, (135), 25 states have internal predecessors, (135), 15 states have call successors, (35), 11 states have call predecessors, (35), 9 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2022-12-14 16:06:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:06:49,990 INFO L93 Difference]: Finished difference Result 225982 states and 375402 transitions. [2022-12-14 16:06:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 16:06:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 33 states have (on average 4.090909090909091) internal successors, (135), 25 states have internal predecessors, (135), 15 states have call successors, (35), 11 states have call predecessors, (35), 9 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 272 [2022-12-14 16:06:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:06:50,854 INFO L225 Difference]: With dead ends: 225982 [2022-12-14 16:06:50,854 INFO L226 Difference]: Without dead ends: 112414 [2022-12-14 16:06:51,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 737 SyntacticMatches, 29 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2464 ImplicationChecksByTransitivity, 158.5s TimeCoverageRelationStatistics Valid=636, Invalid=4766, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 16:06:51,718 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 269 mSDsluCounter, 5449 mSDsCounter, 0 mSdLazyCounter, 9011 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 5869 SdHoareTripleChecker+Invalid, 9084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 9011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:06:51,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 5869 Invalid, 9084 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [73 Valid, 9011 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2022-12-14 16:06:51,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112414 states. [2022-12-14 16:07:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112414 to 112397. [2022-12-14 16:07:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112397 states, 78093 states have (on average 1.4169515833685478) internal successors, (110654), 83467 states have internal predecessors, (110654), 25218 states have call successors, (25218), 8234 states have call predecessors, (25218), 9085 states have return successors, (49778), 23491 states have call predecessors, (49778), 25090 states have call successors, (49778) [2022-12-14 16:07:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112397 states to 112397 states and 185650 transitions. [2022-12-14 16:07:04,725 INFO L78 Accepts]: Start accepts. Automaton has 112397 states and 185650 transitions. Word has length 272 [2022-12-14 16:07:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:04,726 INFO L495 AbstractCegarLoop]: Abstraction has 112397 states and 185650 transitions. [2022-12-14 16:07:04,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 33 states have (on average 4.090909090909091) internal successors, (135), 25 states have internal predecessors, (135), 15 states have call successors, (35), 11 states have call predecessors, (35), 9 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2022-12-14 16:07:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 112397 states and 185650 transitions. [2022-12-14 16:07:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-12-14 16:07:04,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:04,742 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:04,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 16:07:04,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:04,944 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1218912132, now seen corresponding path program 1 times [2022-12-14 16:07:04,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:04,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521393682] [2022-12-14 16:07:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:04,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 16:07:05,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:05,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521393682] [2022-12-14 16:07:05,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521393682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:05,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330481900] [2022-12-14 16:07:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:05,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:05,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:05,288 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:05,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac512877-bdd9-4c26-a9d5-c3c34ae3a227/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 16:07:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 3414 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:07:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 16:07:05,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:05,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330481900] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:05,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:05,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 16:07:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592971414] [2022-12-14 16:07:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:05,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:05,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:07:05,665 INFO L87 Difference]: Start difference. First operand 112397 states and 185650 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40)