./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/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_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/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_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- 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 15:52:22,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:52:22,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:52:22,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:52:22,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:52:22,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:52:22,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:52:22,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:52:22,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:52:22,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:52:22,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:52:22,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:52:22,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:52:22,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:52:22,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:52:22,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:52:22,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:52:22,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:52:22,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:52:22,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:52:22,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:52:22,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:52:22,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:52:22,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:52:22,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:52:22,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:52:22,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:52:22,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:52:22,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:52:22,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:52:22,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:52:22,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:52:22,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:52:22,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:52:22,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:52:22,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:52:22,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:52:22,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:52:22,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:52:22,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:52:22,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:52:22,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:52:22,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:52:22,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:52:22,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:52:22,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:52:22,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:52:22,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:52:22,487 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:52:22,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:52:22,487 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:52:22,487 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:52:22,488 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:52:22,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:52:22,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:52:22,488 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:52:22,488 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:52:22,488 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:52:22,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:52:22,489 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:52:22,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:52:22,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:52:22,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:52:22,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:52:22,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:52:22,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:52:22,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:52:22,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:52:22,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:52:22,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:52:22,491 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:52:22,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:52:22,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:52:22,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:52:22,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:52:22,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:52:22,492 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:52:22,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:52:22,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:52:22,492 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:52:22,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:52:22,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:52:22,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:52:22,493 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_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2022-12-14 15:52:22,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:52:22,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:52:22,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:52:22,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:52:22,677 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:52:22,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2022-12-14 15:52:25,255 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:52:25,479 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:52:25,480 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2022-12-14 15:52:25,492 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/data/b35adc99d/48828ad35ec9439589f9d1db264c47c4/FLAGad0bc6ab5 [2022-12-14 15:52:25,827 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/data/b35adc99d/48828ad35ec9439589f9d1db264c47c4 [2022-12-14 15:52:25,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:52:25,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:52:25,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:52:25,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:52:25,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:52:25,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:52:25" (1/1) ... [2022-12-14 15:52:25,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6417a556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:25, skipping insertion in model container [2022-12-14 15:52:25,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:52:25" (1/1) ... [2022-12-14 15:52:25,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:52:25,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:52:26,206 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_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2022-12-14 15:52:26,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:52:26,217 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:52:26,287 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_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2022-12-14 15:52:26,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:52:26,329 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:52:26,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26 WrapperNode [2022-12-14 15:52:26,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:52:26,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:52:26,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:52:26,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:52:26,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,405 INFO L138 Inliner]: procedures = 93, calls = 348, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1135 [2022-12-14 15:52:26,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:52:26,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:52:26,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:52:26,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:52:26,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:52:26,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:52:26,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:52:26,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:52:26,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (1/1) ... [2022-12-14 15:52:26,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:52:26,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:26,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:52:26,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:52:26,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:52:26,526 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 15:52:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 15:52:26,526 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 15:52:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 15:52:26,526 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 15:52:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 15:52:26,526 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 15:52:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 15:52:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 15:52:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 15:52:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 15:52:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 15:52:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 15:52:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 15:52:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 15:52:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 15:52:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 15:52:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 15:52:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 15:52:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 15:52:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 15:52:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 15:52:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 15:52:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 15:52:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 15:52:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 15:52:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 15:52:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 15:52:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 15:52:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 15:52:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 15:52:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 15:52:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 15:52:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 15:52:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 15:52:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 15:52:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 15:52:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 15:52:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 15:52:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 15:52:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 15:52:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 15:52:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 15:52:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 15:52:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:52:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 15:52:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 15:52:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 15:52:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 15:52:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 15:52:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 15:52:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 15:52:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 15:52:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:52:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:52:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 15:52:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 15:52:26,645 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:52:26,647 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:52:27,414 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:52:27,847 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:52:27,847 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:52:27,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:52:27 BoogieIcfgContainer [2022-12-14 15:52:27,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:52:27,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:52:27,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:52:27,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:52:27,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:52:25" (1/3) ... [2022-12-14 15:52:27,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7fad09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:52:27, skipping insertion in model container [2022-12-14 15:52:27,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:52:26" (2/3) ... [2022-12-14 15:52:27,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7fad09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:52:27, skipping insertion in model container [2022-12-14 15:52:27,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:52:27" (3/3) ... [2022-12-14 15:52:27,855 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product27.cil.c [2022-12-14 15:52:27,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:52:27,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:52:27,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:52:27,915 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;@3502d240, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:52:27,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:52:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-14 15:52:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 15:52:27,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:27,932 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] [2022-12-14 15:52:27,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash -902158784, now seen corresponding path program 1 times [2022-12-14 15:52:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:27,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152468951] [2022-12-14 15:52:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:52:28,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:28,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152468951] [2022-12-14 15:52:28,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152468951] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:28,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:28,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:52:28,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422080058] [2022-12-14 15:52:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:28,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:52:28,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:52:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:52:28,592 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 15:52:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:29,555 INFO L93 Difference]: Finished difference Result 1445 states and 2360 transitions. [2022-12-14 15:52:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:52:29,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-12-14 15:52:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:29,571 INFO L225 Difference]: With dead ends: 1445 [2022-12-14 15:52:29,571 INFO L226 Difference]: Without dead ends: 1037 [2022-12-14 15:52:29,585 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 15:52:29,588 INFO L413 NwaCegarLoop]: 947 mSDtfsCounter, 858 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 4145 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:29,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 4145 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:52:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-12-14 15:52:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 754. [2022-12-14 15:52:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 514 states have (on average 1.5603112840466926) internal successors, (802), 544 states have internal predecessors, (802), 193 states have call successors, (193), 49 states have call predecessors, (193), 46 states have return successors, (200), 180 states have call predecessors, (200), 189 states have call successors, (200) [2022-12-14 15:52:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1195 transitions. [2022-12-14 15:52:29,705 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1195 transitions. Word has length 88 [2022-12-14 15:52:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:29,706 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1195 transitions. [2022-12-14 15:52:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 15:52:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1195 transitions. [2022-12-14 15:52:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 15:52:29,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:29,710 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] [2022-12-14 15:52:29,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:52:29,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 672211433, now seen corresponding path program 1 times [2022-12-14 15:52:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:29,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665299942] [2022-12-14 15:52:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:52:29,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:29,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665299942] [2022-12-14 15:52:29,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665299942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:52:29,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514393732] [2022-12-14 15:52:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:29,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:29,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:29,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:52:29,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:52:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:30,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:52:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:52:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:52:30,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:52:30,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514393732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:30,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:52:30,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:52:30,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810063673] [2022-12-14 15:52:30,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:30,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:52:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:52:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:52:30,301 INFO L87 Difference]: Start difference. First operand 754 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:52:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:30,509 INFO L93 Difference]: Finished difference Result 2138 states and 3454 transitions. [2022-12-14 15:52:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:52:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-12-14 15:52:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:30,519 INFO L225 Difference]: With dead ends: 2138 [2022-12-14 15:52:30,520 INFO L226 Difference]: Without dead ends: 1396 [2022-12-14 15:52:30,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 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 15:52:30,526 INFO L413 NwaCegarLoop]: 1036 mSDtfsCounter, 567 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:30,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1542 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:52:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-12-14 15:52:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1363. [2022-12-14 15:52:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 936 states have (on average 1.5694444444444444) internal successors, (1469), 995 states have internal predecessors, (1469), 339 states have call successors, (339), 88 states have call predecessors, (339), 87 states have return successors, (366), 319 states have call predecessors, (366), 335 states have call successors, (366) [2022-12-14 15:52:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2174 transitions. [2022-12-14 15:52:30,608 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2174 transitions. Word has length 87 [2022-12-14 15:52:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:30,609 INFO L495 AbstractCegarLoop]: Abstraction has 1363 states and 2174 transitions. [2022-12-14 15:52:30,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:52:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2174 transitions. [2022-12-14 15:52:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 15:52:30,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:30,614 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] [2022-12-14 15:52:30,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:52:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:30,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1192664521, now seen corresponding path program 1 times [2022-12-14 15:52:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:30,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395889540] [2022-12-14 15:52:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:30,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:52:31,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395889540] [2022-12-14 15:52:31,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395889540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:52:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655238139] [2022-12-14 15:52:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:31,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:31,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:31,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:52:31,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:52:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:52:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:52:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:52:31,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:52:31,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655238139] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:31,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:52:31,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:52:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436762632] [2022-12-14 15:52:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:52:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:52:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:52:31,323 INFO L87 Difference]: Start difference. First operand 1363 states and 2174 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:52:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:31,525 INFO L93 Difference]: Finished difference Result 2959 states and 4804 transitions. [2022-12-14 15:52:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:52:31,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2022-12-14 15:52:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:31,532 INFO L225 Difference]: With dead ends: 2959 [2022-12-14 15:52:31,532 INFO L226 Difference]: Without dead ends: 1608 [2022-12-14 15:52:31,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 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 15:52:31,539 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 104 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:31,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1417 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:52:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-12-14 15:52:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1391. [2022-12-14 15:52:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 960 states have (on average 1.559375) internal successors, (1497), 1019 states have internal predecessors, (1497), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (370), 323 states have call predecessors, (370), 339 states have call successors, (370) [2022-12-14 15:52:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2210 transitions. [2022-12-14 15:52:31,594 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2210 transitions. Word has length 89 [2022-12-14 15:52:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:31,594 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 2210 transitions. [2022-12-14 15:52:31,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:52:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2210 transitions. [2022-12-14 15:52:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 15:52:31,596 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:31,596 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] [2022-12-14 15:52:31,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:52:31,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:31,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1308187780, now seen corresponding path program 1 times [2022-12-14 15:52:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620170433] [2022-12-14 15:52:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:31,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:52:31,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:31,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620170433] [2022-12-14 15:52:31,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620170433] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:52:31,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145823762] [2022-12-14 15:52:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:31,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:31,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:52:31,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:52:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:52:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:52:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:52:32,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:52:32,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145823762] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:32,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:52:32,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:52:32,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931245348] [2022-12-14 15:52:32,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:32,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:52:32,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:32,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:52:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:52:32,279 INFO L87 Difference]: Start difference. First operand 1391 states and 2210 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:52:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:32,470 INFO L93 Difference]: Finished difference Result 3412 states and 5496 transitions. [2022-12-14 15:52:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:52:32,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-12-14 15:52:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:32,482 INFO L225 Difference]: With dead ends: 3412 [2022-12-14 15:52:32,482 INFO L226 Difference]: Without dead ends: 2033 [2022-12-14 15:52:32,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 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 15:52:32,490 INFO L413 NwaCegarLoop]: 1073 mSDtfsCounter, 567 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:32,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1579 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:52:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-12-14 15:52:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1988. [2022-12-14 15:52:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1376 states have (on average 1.565406976744186) internal successors, (2154), 1464 states have internal predecessors, (2154), 486 states have call successors, (486), 124 states have call predecessors, (486), 125 states have return successors, (533), 459 states have call predecessors, (533), 482 states have call successors, (533) [2022-12-14 15:52:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3173 transitions. [2022-12-14 15:52:32,582 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3173 transitions. Word has length 88 [2022-12-14 15:52:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:32,582 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 3173 transitions. [2022-12-14 15:52:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 15:52:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3173 transitions. [2022-12-14 15:52:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 15:52:32,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:32,585 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] [2022-12-14 15:52:32,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:52:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:32,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash 234902561, now seen corresponding path program 1 times [2022-12-14 15:52:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:32,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486355818] [2022-12-14 15:52:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:52:33,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:33,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486355818] [2022-12-14 15:52:33,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486355818] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:52:33,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987149533] [2022-12-14 15:52:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:33,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:33,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:33,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:52:33,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:52:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:52:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:52:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:52:33,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:52:33,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987149533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:33,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:52:33,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 15:52:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998713749] [2022-12-14 15:52:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:33,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:52:33,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:33,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:52:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:52:33,470 INFO L87 Difference]: Start difference. First operand 1988 states and 3173 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 15:52:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:34,307 INFO L93 Difference]: Finished difference Result 5754 states and 9398 transitions. [2022-12-14 15:52:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:52:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-12-14 15:52:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:34,327 INFO L225 Difference]: With dead ends: 5754 [2022-12-14 15:52:34,327 INFO L226 Difference]: Without dead ends: 3778 [2022-12-14 15:52:34,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:52:34,340 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 636 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:34,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 3286 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:52:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-12-14 15:52:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3750. [2022-12-14 15:52:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 2509 states have (on average 1.5005978477481068) internal successors, (3765), 2730 states have internal predecessors, (3765), 1021 states have call successors, (1021), 220 states have call predecessors, (1021), 219 states have return successors, (1170), 935 states have call predecessors, (1170), 1015 states have call successors, (1170) [2022-12-14 15:52:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 5956 transitions. [2022-12-14 15:52:34,520 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 5956 transitions. Word has length 89 [2022-12-14 15:52:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:34,520 INFO L495 AbstractCegarLoop]: Abstraction has 3750 states and 5956 transitions. [2022-12-14 15:52:34,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 15:52:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 5956 transitions. [2022-12-14 15:52:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:52:34,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:34,522 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:52:34,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:52:34,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:34,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -707606082, now seen corresponding path program 1 times [2022-12-14 15:52:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574079365] [2022-12-14 15:52:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:34,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:52:35,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:35,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574079365] [2022-12-14 15:52:35,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574079365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:35,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:35,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:52:35,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046968434] [2022-12-14 15:52:35,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:35,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:52:35,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:35,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:52:35,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:52:35,072 INFO L87 Difference]: Start difference. First operand 3750 states and 5956 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 15:52:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:36,375 INFO L93 Difference]: Finished difference Result 13068 states and 21685 transitions. [2022-12-14 15:52:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:52:36,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-12-14 15:52:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:36,428 INFO L225 Difference]: With dead ends: 13068 [2022-12-14 15:52:36,428 INFO L226 Difference]: Without dead ends: 9330 [2022-12-14 15:52:36,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:52:36,449 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 813 mSDsluCounter, 4172 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 5134 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:36,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 5134 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:52:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2022-12-14 15:52:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7271. [2022-12-14 15:52:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 4892 states have (on average 1.5008176614881439) internal successors, (7342), 5349 states have internal predecessors, (7342), 1981 states have call successors, (1981), 395 states have call predecessors, (1981), 397 states have return successors, (2451), 1769 states have call predecessors, (2451), 1973 states have call successors, (2451) [2022-12-14 15:52:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 11774 transitions. [2022-12-14 15:52:36,874 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 11774 transitions. Word has length 94 [2022-12-14 15:52:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:36,874 INFO L495 AbstractCegarLoop]: Abstraction has 7271 states and 11774 transitions. [2022-12-14 15:52:36,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 15:52:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 11774 transitions. [2022-12-14 15:52:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 15:52:36,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:36,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:52:36,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:52:36,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash 570490418, now seen corresponding path program 1 times [2022-12-14 15:52:36,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:36,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811277390] [2022-12-14 15:52:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:36,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:52:37,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811277390] [2022-12-14 15:52:37,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811277390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:52:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985033476] [2022-12-14 15:52:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:37,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:37,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:52:37,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:52:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:52:37,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:52:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:52:37,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:52:37,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985033476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:37,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:52:37,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 15:52:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085670145] [2022-12-14 15:52:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:37,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:52:37,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:52:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:52:37,472 INFO L87 Difference]: Start difference. First operand 7271 states and 11774 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 15:52:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:39,567 INFO L93 Difference]: Finished difference Result 18160 states and 30162 transitions. [2022-12-14 15:52:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:52:39,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 100 [2022-12-14 15:52:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:39,621 INFO L225 Difference]: With dead ends: 18160 [2022-12-14 15:52:39,621 INFO L226 Difference]: Without dead ends: 10901 [2022-12-14 15:52:39,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:52:39,651 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1336 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2334 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 15:52:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10901 states. [2022-12-14 15:52:40,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10901 to 7978. [2022-12-14 15:52:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7978 states, 5419 states have (on average 1.4825613581841668) internal successors, (8034), 5894 states have internal predecessors, (8034), 2113 states have call successors, (2113), 451 states have call predecessors, (2113), 445 states have return successors, (2598), 1875 states have call predecessors, (2598), 2105 states have call successors, (2598) [2022-12-14 15:52:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7978 states to 7978 states and 12745 transitions. [2022-12-14 15:52:40,175 INFO L78 Accepts]: Start accepts. Automaton has 7978 states and 12745 transitions. Word has length 100 [2022-12-14 15:52:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:40,175 INFO L495 AbstractCegarLoop]: Abstraction has 7978 states and 12745 transitions. [2022-12-14 15:52:40,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 15:52:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 7978 states and 12745 transitions. [2022-12-14 15:52:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 15:52:40,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:40,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:52:40,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:52:40,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 15:52:40,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2123428942, now seen corresponding path program 1 times [2022-12-14 15:52:40,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:40,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076481130] [2022-12-14 15:52:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:40,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 15:52:40,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076481130] [2022-12-14 15:52:40,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076481130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:40,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:40,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:52:40,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884684656] [2022-12-14 15:52:40,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:40,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:52:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:40,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:52:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:52:40,605 INFO L87 Difference]: Start difference. First operand 7978 states and 12745 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:52:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:41,498 INFO L93 Difference]: Finished difference Result 17007 states and 27766 transitions. [2022-12-14 15:52:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:52:41,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2022-12-14 15:52:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:41,552 INFO L225 Difference]: With dead ends: 17007 [2022-12-14 15:52:41,552 INFO L226 Difference]: Without dead ends: 10406 [2022-12-14 15:52:41,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:52:41,588 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 202 mSDsluCounter, 3129 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:41,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 3802 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:52:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2022-12-14 15:52:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 7567. [2022-12-14 15:52:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7567 states, 5261 states have (on average 1.4693024139897357) internal successors, (7730), 5623 states have internal predecessors, (7730), 1830 states have call successors, (1830), 451 states have call predecessors, (1830), 475 states have return successors, (2398), 1648 states have call predecessors, (2398), 1822 states have call successors, (2398) [2022-12-14 15:52:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7567 states to 7567 states and 11958 transitions. [2022-12-14 15:52:42,004 INFO L78 Accepts]: Start accepts. Automaton has 7567 states and 11958 transitions. Word has length 105 [2022-12-14 15:52:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:42,004 INFO L495 AbstractCegarLoop]: Abstraction has 7567 states and 11958 transitions. [2022-12-14 15:52:42,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:52:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7567 states and 11958 transitions. [2022-12-14 15:52:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 15:52:42,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:42,007 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:52:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:52:42,007 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1668219984, now seen corresponding path program 1 times [2022-12-14 15:52:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:42,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810987191] [2022-12-14 15:52:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 15:52:42,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810987191] [2022-12-14 15:52:42,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810987191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:42,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:42,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 15:52:42,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44123221] [2022-12-14 15:52:42,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:42,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:52:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:52:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:52:42,364 INFO L87 Difference]: Start difference. First operand 7567 states and 11958 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 15:52:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:46,079 INFO L93 Difference]: Finished difference Result 18984 states and 31099 transitions. [2022-12-14 15:52:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 15:52:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 109 [2022-12-14 15:52:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:46,131 INFO L225 Difference]: With dead ends: 18984 [2022-12-14 15:52:46,132 INFO L226 Difference]: Without dead ends: 13521 [2022-12-14 15:52:46,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-12-14 15:52:46,156 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 2162 mSDsluCounter, 2621 mSDsCounter, 0 mSdLazyCounter, 5902 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 5902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:46,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2267 Valid, 3042 Invalid, 6911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 5902 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 15:52:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2022-12-14 15:52:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 12834. [2022-12-14 15:52:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12834 states, 9007 states have (on average 1.4764072388142555) internal successors, (13298), 9587 states have internal predecessors, (13298), 2990 states have call successors, (2990), 769 states have call predecessors, (2990), 836 states have return successors, (4267), 2723 states have call predecessors, (4267), 2978 states have call successors, (4267) [2022-12-14 15:52:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12834 states to 12834 states and 20555 transitions. [2022-12-14 15:52:46,926 INFO L78 Accepts]: Start accepts. Automaton has 12834 states and 20555 transitions. Word has length 109 [2022-12-14 15:52:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:46,926 INFO L495 AbstractCegarLoop]: Abstraction has 12834 states and 20555 transitions. [2022-12-14 15:52:46,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 15:52:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 12834 states and 20555 transitions. [2022-12-14 15:52:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 15:52:46,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:46,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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 15:52:46,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:52:46,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:46,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:46,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1850839532, now seen corresponding path program 1 times [2022-12-14 15:52:46,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:46,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078959773] [2022-12-14 15:52:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:46,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 15:52:47,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:47,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078959773] [2022-12-14 15:52:47,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078959773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:47,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:47,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:52:47,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246610625] [2022-12-14 15:52:47,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:47,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:52:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:52:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:52:47,167 INFO L87 Difference]: Start difference. First operand 12834 states and 20555 transitions. Second operand has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 15:52:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:48,231 INFO L93 Difference]: Finished difference Result 18409 states and 29590 transitions. [2022-12-14 15:52:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:52:48,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 136 [2022-12-14 15:52:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:48,288 INFO L225 Difference]: With dead ends: 18409 [2022-12-14 15:52:48,288 INFO L226 Difference]: Without dead ends: 12919 [2022-12-14 15:52:48,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:52:48,320 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 466 mSDsluCounter, 4081 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 4818 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:48,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 4818 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:52:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12919 states. [2022-12-14 15:52:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12919 to 11956. [2022-12-14 15:52:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 8477 states have (on average 1.4811843812669576) internal successors, (12556), 8979 states have internal predecessors, (12556), 2642 states have call successors, (2642), 769 states have call predecessors, (2642), 836 states have return successors, (3436), 2453 states have call predecessors, (3436), 2630 states have call successors, (3436) [2022-12-14 15:52:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 18634 transitions. [2022-12-14 15:52:49,008 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 18634 transitions. Word has length 136 [2022-12-14 15:52:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:49,009 INFO L495 AbstractCegarLoop]: Abstraction has 11956 states and 18634 transitions. [2022-12-14 15:52:49,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 15:52:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 18634 transitions. [2022-12-14 15:52:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 15:52:49,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:49,013 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2022-12-14 15:52:49,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:52:49,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash -361719446, now seen corresponding path program 1 times [2022-12-14 15:52:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:49,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043834145] [2022-12-14 15:52:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 15:52:49,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:49,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043834145] [2022-12-14 15:52:49,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043834145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:49,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:52:49,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 15:52:49,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283083570] [2022-12-14 15:52:49,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:49,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:52:49,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:52:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:52:49,423 INFO L87 Difference]: Start difference. First operand 11956 states and 18634 transitions. Second operand has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 15:52:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:52:54,784 INFO L93 Difference]: Finished difference Result 24989 states and 40283 transitions. [2022-12-14 15:52:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 15:52:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 140 [2022-12-14 15:52:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:52:54,868 INFO L225 Difference]: With dead ends: 24989 [2022-12-14 15:52:54,868 INFO L226 Difference]: Without dead ends: 24970 [2022-12-14 15:52:54,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 15:52:54,880 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 2902 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 8018 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3008 SdHoareTripleChecker+Valid, 4254 SdHoareTripleChecker+Invalid, 9303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 8018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:52:54,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3008 Valid, 4254 Invalid, 9303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 8018 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 15:52:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24970 states. [2022-12-14 15:52:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24970 to 23464. [2022-12-14 15:52:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 17323 states have (on average 1.5041274606015125) internal successors, (26056), 18052 states have internal predecessors, (26056), 4477 states have call successors, (4477), 1491 states have call predecessors, (4477), 1663 states have return successors, (6350), 4256 states have call predecessors, (6350), 4461 states have call successors, (6350) [2022-12-14 15:52:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 36883 transitions. [2022-12-14 15:52:56,110 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 36883 transitions. Word has length 140 [2022-12-14 15:52:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:52:56,110 INFO L495 AbstractCegarLoop]: Abstraction has 23464 states and 36883 transitions. [2022-12-14 15:52:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 15:52:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 36883 transitions. [2022-12-14 15:52:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 15:52:56,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:52:56,117 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:52:56,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:52:56,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:52:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:52:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash -376789069, now seen corresponding path program 1 times [2022-12-14 15:52:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:52:56,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453649642] [2022-12-14 15:52:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:56,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:52:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 15:52:56,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:52:56,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453649642] [2022-12-14 15:52:56,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453649642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:52:56,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169422332] [2022-12-14 15:52:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:52:56,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:52:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:52:56,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:52:56,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:52:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:52:56,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 2009 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:52:56,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:52:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 15:52:56,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:52:56,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169422332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:52:56,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:52:56,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-12-14 15:52:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218721654] [2022-12-14 15:52:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:52:56,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:52:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:52:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:52:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:52:56,703 INFO L87 Difference]: Start difference. First operand 23464 states and 36883 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 15:53:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:00,359 INFO L93 Difference]: Finished difference Result 49958 states and 79541 transitions. [2022-12-14 15:53:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:53:00,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) Word has length 160 [2022-12-14 15:53:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:00,455 INFO L225 Difference]: With dead ends: 49958 [2022-12-14 15:53:00,455 INFO L226 Difference]: Without dead ends: 26130 [2022-12-14 15:53:00,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-12-14 15:53:00,527 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1853 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 3723 mSolverCounterSat, 1156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 4879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 3723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:00,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1891 Valid, 1432 Invalid, 4879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1156 Valid, 3723 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 15:53:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26130 states. [2022-12-14 15:53:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26130 to 23449. [2022-12-14 15:53:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23449 states, 17308 states have (on average 1.5043910330483015) internal successors, (26038), 18037 states have internal predecessors, (26038), 4477 states have call successors, (4477), 1491 states have call predecessors, (4477), 1663 states have return successors, (6350), 4256 states have call predecessors, (6350), 4461 states have call successors, (6350) [2022-12-14 15:53:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23449 states to 23449 states and 36865 transitions. [2022-12-14 15:53:01,890 INFO L78 Accepts]: Start accepts. Automaton has 23449 states and 36865 transitions. Word has length 160 [2022-12-14 15:53:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:01,891 INFO L495 AbstractCegarLoop]: Abstraction has 23449 states and 36865 transitions. [2022-12-14 15:53:01,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 15:53:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 23449 states and 36865 transitions. [2022-12-14 15:53:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 15:53:01,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:01,897 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:53:01,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:53:02,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:02,098 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash 827792010, now seen corresponding path program 1 times [2022-12-14 15:53:02,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:02,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320402967] [2022-12-14 15:53:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:02,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 15:53:02,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:02,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320402967] [2022-12-14 15:53:02,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320402967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:02,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:53:02,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:53:02,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802447571] [2022-12-14 15:53:02,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:53:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:02,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:53:02,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:53:02,203 INFO L87 Difference]: Start difference. First operand 23449 states and 36865 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 15:53:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:04,343 INFO L93 Difference]: Finished difference Result 54804 states and 87213 transitions. [2022-12-14 15:53:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:53:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2022-12-14 15:53:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:04,452 INFO L225 Difference]: With dead ends: 54804 [2022-12-14 15:53:04,453 INFO L226 Difference]: Without dead ends: 31367 [2022-12-14 15:53:04,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 15:53:04,527 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 527 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1394 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 15:53:04,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1394 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:53:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31367 states. [2022-12-14 15:53:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31367 to 31076. [2022-12-14 15:53:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31076 states, 22971 states have (on average 1.5050280788820687) internal successors, (34572), 23950 states have internal predecessors, (34572), 5891 states have call successors, (5891), 1970 states have call predecessors, (5891), 2213 states have return successors, (8425), 5605 states have call predecessors, (8425), 5875 states have call successors, (8425) [2022-12-14 15:53:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31076 states to 31076 states and 48888 transitions. [2022-12-14 15:53:06,338 INFO L78 Accepts]: Start accepts. Automaton has 31076 states and 48888 transitions. Word has length 173 [2022-12-14 15:53:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:06,338 INFO L495 AbstractCegarLoop]: Abstraction has 31076 states and 48888 transitions. [2022-12-14 15:53:06,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 15:53:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 31076 states and 48888 transitions. [2022-12-14 15:53:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 15:53:06,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:06,347 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:53:06,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:53:06,347 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:06,347 INFO L85 PathProgramCache]: Analyzing trace with hash -865700315, now seen corresponding path program 1 times [2022-12-14 15:53:06,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:06,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379552596] [2022-12-14 15:53:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:06,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 15:53:06,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:06,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379552596] [2022-12-14 15:53:06,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379552596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:53:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282606874] [2022-12-14 15:53:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:53:06,552 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:53:06,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:53:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:53:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:53:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:53:06,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:53:06,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282606874] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:06,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:53:06,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-12-14 15:53:06,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667962159] [2022-12-14 15:53:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 15:53:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 15:53:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:53:06,821 INFO L87 Difference]: Start difference. First operand 31076 states and 48888 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-12-14 15:53:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:10,700 INFO L93 Difference]: Finished difference Result 80699 states and 128412 transitions. [2022-12-14 15:53:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:53:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2022-12-14 15:53:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:10,885 INFO L225 Difference]: With dead ends: 80699 [2022-12-14 15:53:10,885 INFO L226 Difference]: Without dead ends: 52879 [2022-12-14 15:53:10,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:53:10,983 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 709 mSDsluCounter, 3905 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 4640 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:10,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 4640 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:53:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52879 states. [2022-12-14 15:53:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52879 to 51801. [2022-12-14 15:53:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51801 states, 38393 states have (on average 1.511108795874248) internal successors, (58016), 39962 states have internal predecessors, (58016), 9777 states have call successors, (9777), 3248 states have call predecessors, (9777), 3630 states have return successors, (14466), 9310 states have call predecessors, (14466), 9749 states have call successors, (14466) [2022-12-14 15:53:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51801 states to 51801 states and 82259 transitions. [2022-12-14 15:53:14,447 INFO L78 Accepts]: Start accepts. Automaton has 51801 states and 82259 transitions. Word has length 178 [2022-12-14 15:53:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:14,447 INFO L495 AbstractCegarLoop]: Abstraction has 51801 states and 82259 transitions. [2022-12-14 15:53:14,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-12-14 15:53:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 51801 states and 82259 transitions. [2022-12-14 15:53:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 15:53:14,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:14,457 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:53:14,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:53:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:53:14,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1829717061, now seen corresponding path program 1 times [2022-12-14 15:53:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:14,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570245363] [2022-12-14 15:53:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:14,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 15:53:14,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:14,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570245363] [2022-12-14 15:53:14,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570245363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:53:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220583006] [2022-12-14 15:53:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:14,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:53:14,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:53:14,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:53:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:53:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:53:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:53:15,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:53:15,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220583006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:15,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:53:15,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2022-12-14 15:53:15,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458537529] [2022-12-14 15:53:15,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:15,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:53:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:53:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:53:15,194 INFO L87 Difference]: Start difference. First operand 51801 states and 82259 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-12-14 15:53:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:19,383 INFO L93 Difference]: Finished difference Result 106699 states and 169470 transitions. [2022-12-14 15:53:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:53:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 180 [2022-12-14 15:53:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:19,604 INFO L225 Difference]: With dead ends: 106699 [2022-12-14 15:53:19,604 INFO L226 Difference]: Without dead ends: 58269 [2022-12-14 15:53:19,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:53:19,769 INFO L413 NwaCegarLoop]: 1052 mSDtfsCounter, 606 mSDsluCounter, 4455 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 5507 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:19,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 5507 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:53:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58269 states. [2022-12-14 15:53:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58269 to 58161. [2022-12-14 15:53:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58161 states, 43211 states have (on average 1.5100321677350674) internal successors, (65250), 44894 states have internal predecessors, (65250), 10798 states have call successors, (10798), 3738 states have call predecessors, (10798), 4151 states have return successors, (15665), 10338 states have call predecessors, (15665), 10760 states have call successors, (15665) [2022-12-14 15:53:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58161 states to 58161 states and 91713 transitions. [2022-12-14 15:53:23,548 INFO L78 Accepts]: Start accepts. Automaton has 58161 states and 91713 transitions. Word has length 180 [2022-12-14 15:53:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:23,548 INFO L495 AbstractCegarLoop]: Abstraction has 58161 states and 91713 transitions. [2022-12-14 15:53:23,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-12-14 15:53:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 58161 states and 91713 transitions. [2022-12-14 15:53:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 15:53:23,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:23,560 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 15:53:23,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:53:23,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:53:23,762 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1941050463, now seen corresponding path program 1 times [2022-12-14 15:53:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:23,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605010534] [2022-12-14 15:53:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:23,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 15:53:23,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:23,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605010534] [2022-12-14 15:53:23,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605010534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:53:23,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:53:23,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:53:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043978205] [2022-12-14 15:53:23,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:53:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:53:23,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:53:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:53:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:53:23,900 INFO L87 Difference]: Start difference. First operand 58161 states and 91713 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 15:53:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:53:27,826 INFO L93 Difference]: Finished difference Result 117751 states and 189238 transitions. [2022-12-14 15:53:27,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:53:27,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 186 [2022-12-14 15:53:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:53:28,115 INFO L225 Difference]: With dead ends: 117751 [2022-12-14 15:53:28,115 INFO L226 Difference]: Without dead ends: 62852 [2022-12-14 15:53:28,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 15:53:28,459 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 102 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:53:28,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1403 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:53:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62852 states. [2022-12-14 15:53:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62852 to 58125. [2022-12-14 15:53:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58125 states, 43187 states have (on average 1.5100377428392804) internal successors, (65214), 44870 states have internal predecessors, (65214), 10786 states have call successors, (10786), 3738 states have call predecessors, (10786), 4151 states have return successors, (15653), 10326 states have call predecessors, (15653), 10748 states have call successors, (15653) [2022-12-14 15:53:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58125 states to 58125 states and 91653 transitions. [2022-12-14 15:53:32,083 INFO L78 Accepts]: Start accepts. Automaton has 58125 states and 91653 transitions. Word has length 186 [2022-12-14 15:53:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:53:32,084 INFO L495 AbstractCegarLoop]: Abstraction has 58125 states and 91653 transitions. [2022-12-14 15:53:32,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 15:53:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 58125 states and 91653 transitions. [2022-12-14 15:53:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-12-14 15:53:32,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:53:32,095 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 15:53:32,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 15:53:32,095 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:53:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:53:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1050161582, now seen corresponding path program 1 times [2022-12-14 15:53:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:53:32,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552704023] [2022-12-14 15:53:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:53:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-12-14 15:53:33,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:53:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552704023] [2022-12-14 15:53:33,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552704023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:53:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439295702] [2022-12-14 15:53:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:53:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:53:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:53:33,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:53:33,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:53:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:53:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:53:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:53:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:53:33,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:53:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 15:53:33,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439295702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:53:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442898233] [2022-12-14 15:53:33,892 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-12-14 15:53:33,892 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:53:33,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:53:33,899 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:53:33,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:53:39,609 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 690 for LOIs [2022-12-14 15:55:22,435 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 39 for LOIs [2022-12-14 15:55:22,438 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 55 for LOIs [2022-12-14 15:55:22,589 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 455 for LOIs [2022-12-14 15:55:23,740 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 427 for LOIs [2022-12-14 15:55:24,339 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 68 for LOIs [2022-12-14 15:55:24,353 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 66 for LOIs [2022-12-14 15:55:24,367 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 601 for LOIs [2022-12-14 15:55:26,334 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 575 for LOIs [2022-12-14 15:55:26,525 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 90 for LOIs [2022-12-14 15:55:26,533 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 65 for LOIs [2022-12-14 15:55:26,548 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 90 for LOIs [2022-12-14 15:55:26,556 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 575 for LOIs [2022-12-14 15:55:29,779 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 579 for LOIs [2022-12-14 15:55:30,328 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 507 for LOIs [2022-12-14 15:55:30,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:56:17,166 WARN L233 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 633 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:56:26,796 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 654 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:56:35,834 WARN L233 SmtUtils]: Spent 8.63s on a formula simplification. DAG size of input: 659 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:56:45,887 WARN L233 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 673 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:56:54,308 WARN L233 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 673 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:04,711 WARN L233 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 674 DAG size of output: 612 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:15,312 WARN L233 SmtUtils]: Spent 9.43s on a formula simplification. DAG size of input: 682 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:24,321 WARN L233 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 676 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:35,170 WARN L233 SmtUtils]: Spent 9.77s on a formula simplification. DAG size of input: 674 DAG size of output: 618 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:45,013 WARN L233 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 684 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:54,400 WARN L233 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 681 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:58:05,125 WARN L233 SmtUtils]: Spent 9.50s on a formula simplification. DAG size of input: 679 DAG size of output: 618 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:58:15,251 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification. DAG size of input: 690 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:58:25,953 WARN L233 SmtUtils]: Spent 10.01s on a formula simplification. DAG size of input: 687 DAG size of output: 629 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:58:45,642 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 694 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:59:06,284 WARN L233 SmtUtils]: Spent 9.94s on a formula simplification. DAG size of input: 651 DAG size of output: 599 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:59:35,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1204957#(and (= ~executiveFloor~0 4) (<= ~floorButtons_2~0 2147483647) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= 0 (+ ~floorButtons_2~0 2147483648)) (<= 0 ~floorButtons_0~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= ~floorButtons_1~0 0) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 15:59:35,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:59:35,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:59:35,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 35 [2022-12-14 15:59:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356813004] [2022-12-14 15:59:35,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:59:35,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 15:59:35,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 15:59:35,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=10683, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 15:59:35,383 INFO L87 Difference]: Start difference. First operand 58125 states and 91653 transitions. Second operand has 35 states, 29 states have (on average 6.344827586206897) internal successors, (184), 29 states have internal predecessors, (184), 12 states have call successors, (67), 10 states have call predecessors, (67), 12 states have return successors, (68), 15 states have call predecessors, (68), 11 states have call successors, (68) [2022-12-14 16:00:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:03,775 INFO L93 Difference]: Finished difference Result 163476 states and 278458 transitions. [2022-12-14 16:00:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-12-14 16:00:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 6.344827586206897) internal successors, (184), 29 states have internal predecessors, (184), 12 states have call successors, (67), 10 states have call predecessors, (67), 12 states have return successors, (68), 15 states have call predecessors, (68), 11 states have call successors, (68) Word has length 189 [2022-12-14 16:00:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:04,343 INFO L225 Difference]: With dead ends: 163476 [2022-12-14 16:00:04,343 INFO L226 Difference]: Without dead ends: 105251 [2022-12-14 16:00:04,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 511 SyntacticMatches, 17 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24688 ImplicationChecksByTransitivity, 249.0s TimeCoverageRelationStatistics Valid=5363, Invalid=50097, Unknown=0, NotChecked=0, Total=55460 [2022-12-14 16:00:04,741 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 15593 mSDsluCounter, 5880 mSDsCounter, 0 mSdLazyCounter, 24547 mSolverCounterSat, 10797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15642 SdHoareTripleChecker+Valid, 6499 SdHoareTripleChecker+Invalid, 35344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10797 IncrementalHoareTripleChecker+Valid, 24547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:04,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15642 Valid, 6499 Invalid, 35344 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10797 Valid, 24547 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-12-14 16:00:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105251 states. [2022-12-14 16:00:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105251 to 97550. [2022-12-14 16:00:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97550 states, 70734 states have (on average 1.4259761924958294) internal successors, (100865), 73759 states have internal predecessors, (100865), 19086 states have call successors, (19086), 7104 states have call predecessors, (19086), 7729 states have return successors, (33794), 18246 states have call predecessors, (33794), 18994 states have call successors, (33794) [2022-12-14 16:00:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97550 states to 97550 states and 153745 transitions. [2022-12-14 16:00:11,964 INFO L78 Accepts]: Start accepts. Automaton has 97550 states and 153745 transitions. Word has length 189 [2022-12-14 16:00:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:11,964 INFO L495 AbstractCegarLoop]: Abstraction has 97550 states and 153745 transitions. [2022-12-14 16:00:11,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 6.344827586206897) internal successors, (184), 29 states have internal predecessors, (184), 12 states have call successors, (67), 10 states have call predecessors, (67), 12 states have return successors, (68), 15 states have call predecessors, (68), 11 states have call successors, (68) [2022-12-14 16:00:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 97550 states and 153745 transitions. [2022-12-14 16:00:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-12-14 16:00:11,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:11,978 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:00:11,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 16:00:12,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 16:00:12,180 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:12,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:12,182 INFO L85 PathProgramCache]: Analyzing trace with hash 428372699, now seen corresponding path program 1 times [2022-12-14 16:00:12,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:12,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727524326] [2022-12-14 16:00:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 16:00:12,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727524326] [2022-12-14 16:00:12,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727524326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:00:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228630810] [2022-12-14 16:00:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:12,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:12,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:12,830 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:12,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 16:00:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:13,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 16:00:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 112 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 16:00:13,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:00:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 16:00:13,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228630810] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:00:13,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70299652] [2022-12-14 16:00:13,801 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2022-12-14 16:00:13,801 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:00:13,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:00:13,802 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:00:13,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:00:19,572 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 685 for LOIs [2022-12-14 16:00:27,267 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-12-14 16:00:27,268 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 77 for LOIs [2022-12-14 16:00:27,508 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 35 for LOIs [2022-12-14 16:00:27,535 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 35 for LOIs [2022-12-14 16:00:27,618 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 61 for LOIs [2022-12-14 16:00:27,632 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 63 for LOIs [2022-12-14 16:00:27,647 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 601 for LOIs [2022-12-14 16:00:29,602 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 575 for LOIs [2022-12-14 16:00:29,793 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 35 for LOIs [2022-12-14 16:00:29,794 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 89 for LOIs [2022-12-14 16:00:29,899 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 84 for LOIs [2022-12-14 16:00:29,923 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 59 for LOIs [2022-12-14 16:00:29,932 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 575 for LOIs [2022-12-14 16:00:33,227 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 579 for LOIs [2022-12-14 16:00:33,774 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 507 for LOIs [2022-12-14 16:00:33,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:01:36,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1579595#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 16:01:36,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:01:36,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:01:36,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 10] total 22 [2022-12-14 16:01:36,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620220726] [2022-12-14 16:01:36,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:01:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 16:01:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:01:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 16:01:36,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=12490, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 16:01:36,524 INFO L87 Difference]: Start difference. First operand 97550 states and 153745 transitions. Second operand has 22 states, 19 states have (on average 9.526315789473685) internal successors, (181), 20 states have internal predecessors, (181), 10 states have call successors, (76), 9 states have call predecessors, (76), 12 states have return successors, (77), 13 states have call predecessors, (77), 10 states have call successors, (77) [2022-12-14 16:01:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:58,859 INFO L93 Difference]: Finished difference Result 216836 states and 375339 transitions. [2022-12-14 16:01:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 16:01:58,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 9.526315789473685) internal successors, (181), 20 states have internal predecessors, (181), 10 states have call successors, (76), 9 states have call predecessors, (76), 12 states have return successors, (77), 13 states have call predecessors, (77), 10 states have call successors, (77) Word has length 207 [2022-12-14 16:01:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:59,700 INFO L225 Difference]: With dead ends: 216836 [2022-12-14 16:01:59,700 INFO L226 Difference]: Without dead ends: 156178 [2022-12-14 16:02:00,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 529 SyntacticMatches, 11 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15292 ImplicationChecksByTransitivity, 64.1s TimeCoverageRelationStatistics Valid=2235, Invalid=33675, Unknown=0, NotChecked=0, Total=35910 [2022-12-14 16:02:00,172 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 9237 mSDsluCounter, 4815 mSDsCounter, 0 mSdLazyCounter, 12932 mSolverCounterSat, 6392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9332 SdHoareTripleChecker+Valid, 5447 SdHoareTripleChecker+Invalid, 19324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6392 IncrementalHoareTripleChecker+Valid, 12932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:00,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9332 Valid, 5447 Invalid, 19324 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6392 Valid, 12932 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-12-14 16:02:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156178 states. [2022-12-14 16:02:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156178 to 144563. [2022-12-14 16:02:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144563 states, 103763 states have (on average 1.423937241598643) internal successors, (147752), 108497 states have internal predecessors, (147752), 28952 states have call successors, (28952), 10881 states have call predecessors, (28952), 11847 states have return successors, (57602), 27638 states have call predecessors, (57602), 28839 states have call successors, (57602) [2022-12-14 16:02:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144563 states to 144563 states and 234306 transitions. [2022-12-14 16:02:12,673 INFO L78 Accepts]: Start accepts. Automaton has 144563 states and 234306 transitions. Word has length 207 [2022-12-14 16:02:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:12,674 INFO L495 AbstractCegarLoop]: Abstraction has 144563 states and 234306 transitions. [2022-12-14 16:02:12,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 9.526315789473685) internal successors, (181), 20 states have internal predecessors, (181), 10 states have call successors, (76), 9 states have call predecessors, (76), 12 states have return successors, (77), 13 states have call predecessors, (77), 10 states have call successors, (77) [2022-12-14 16:02:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 144563 states and 234306 transitions. [2022-12-14 16:02:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-14 16:02:12,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:12,689 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:12,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 16:02:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 16:02:12,891 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 849817437, now seen corresponding path program 1 times [2022-12-14 16:02:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:12,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866200007] [2022-12-14 16:02:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-14 16:02:13,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:13,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866200007] [2022-12-14 16:02:13,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866200007] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:13,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577403179] [2022-12-14 16:02:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:13,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:13,547 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:13,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f921e55-ce61-43c5-ae0e-1c8c4e79f6aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 16:02:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 16:02:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 16:02:14,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:02:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-12-14 16:02:14,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577403179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:02:14,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192574812] [2022-12-14 16:02:14,800 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2022-12-14 16:02:14,800 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:02:14,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:02:14,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:02:14,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:02:20,432 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 681 for LOIs [2022-12-14 16:02:30,325 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-12-14 16:02:30,326 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 64 for LOIs [2022-12-14 16:02:30,709 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 52 for LOIs [2022-12-14 16:02:30,757 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 34 for LOIs [2022-12-14 16:02:30,838 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 34 for LOIs [2022-12-14 16:02:30,846 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 62 for LOIs [2022-12-14 16:02:30,860 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 601 for LOIs [2022-12-14 16:02:32,853 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 575 for LOIs [2022-12-14 16:02:33,043 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 52 for LOIs [2022-12-14 16:02:33,048 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 67 for LOIs [2022-12-14 16:02:33,214 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 39 for LOIs [2022-12-14 16:02:33,215 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 41 for LOIs [2022-12-14 16:02:33,218 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 58 for LOIs [2022-12-14 16:02:33,227 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 575 for LOIs [2022-12-14 16:02:36,476 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 579 for LOIs [2022-12-14 16:02:37,027 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 507 for LOIs [2022-12-14 16:02:37,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:03:47,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2096494#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 16:03:47,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:03:47,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:03:47,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-12-14 16:03:47,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672727256] [2022-12-14 16:03:47,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:47,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 16:03:47,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 16:03:47,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=15633, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 16:03:47,077 INFO L87 Difference]: Start difference. First operand 144563 states and 234306 transitions. Second operand has 33 states, 26 states have (on average 8.115384615384615) internal successors, (211), 27 states have internal predecessors, (211), 13 states have call successors, (88), 9 states have call predecessors, (88), 13 states have return successors, (86), 20 states have call predecessors, (86), 13 states have call successors, (86) [2022-12-14 16:05:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:05:01,554 INFO L93 Difference]: Finished difference Result 400039 states and 724704 transitions. [2022-12-14 16:05:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2022-12-14 16:05:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 8.115384615384615) internal successors, (211), 27 states have internal predecessors, (211), 13 states have call successors, (88), 9 states have call predecessors, (88), 13 states have return successors, (86), 20 states have call predecessors, (86), 13 states have call successors, (86) Word has length 215 [2022-12-14 16:05:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:05:03,480 INFO L225 Difference]: With dead ends: 400039 [2022-12-14 16:05:03,480 INFO L226 Difference]: Without dead ends: 257802 [2022-12-14 16:05:05,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 559 SyntacticMatches, 9 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60229 ImplicationChecksByTransitivity, 78.2s TimeCoverageRelationStatistics Valid=9840, Invalid=128916, Unknown=0, NotChecked=0, Total=138756 [2022-12-14 16:05:05,281 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 19518 mSDsluCounter, 11843 mSDsCounter, 0 mSdLazyCounter, 61765 mSolverCounterSat, 22057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19590 SdHoareTripleChecker+Valid, 12625 SdHoareTripleChecker+Invalid, 83822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 22057 IncrementalHoareTripleChecker+Valid, 61765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:05:05,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19590 Valid, 12625 Invalid, 83822 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [22057 Valid, 61765 Invalid, 0 Unknown, 0 Unchecked, 35.5s Time] [2022-12-14 16:05:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257802 states.