./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW --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 da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- 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-4e7fbc6 [2022-11-23 15:14:07,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:14:07,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:14:07,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:14:07,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:14:07,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:14:07,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:14:07,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:14:07,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:14:07,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:14:07,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:14:07,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:14:07,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:14:07,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:14:07,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:14:07,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:14:07,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:14:07,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:14:07,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:14:07,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:14:07,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:14:07,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:14:07,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:14:07,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:14:07,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:14:07,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:14:07,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:14:07,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:14:07,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:14:07,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:14:07,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:14:07,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:14:07,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:14:07,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:14:07,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:14:07,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:14:07,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:14:07,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:14:07,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:14:07,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:14:07,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:14:07,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:14:07,612 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:14:07,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:14:07,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:14:07,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:14:07,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:14:07,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:14:07,615 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:14:07,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:14:07,615 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:14:07,616 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:14:07,617 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:14:07,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:14:07,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:14:07,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:14:07,618 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:14:07,618 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:14:07,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:14:07,618 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:14:07,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:14:07,622 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:14:07,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:14:07,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:14:07,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:14:07,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:14:07,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:14:07,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:14:07,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:14:07,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:14:07,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:14:07,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:14:07,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:14:07,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:14:07,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:14:07,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:14:07,631 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:14:07,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:14:07,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:14:07,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:14:07,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:14:07,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:14:07,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:14:07,632 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_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2022-11-23 15:14:07,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:14:07,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:14:07,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:14:07,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:14:07,966 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:14:07,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-11-23 15:14:11,019 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:14:11,381 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:14:11,381 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-11-23 15:14:11,403 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/data/240948ade/1b7ad6c806204d6ca3aade2c5286c27a/FLAG15c61d7f0 [2022-11-23 15:14:11,418 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/data/240948ade/1b7ad6c806204d6ca3aade2c5286c27a [2022-11-23 15:14:11,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:14:11,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:14:11,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:14:11,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:14:11,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:14:11,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:14:11" (1/1) ... [2022-11-23 15:14:11,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd84f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:11, skipping insertion in model container [2022-11-23 15:14:11,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:14:11" (1/1) ... [2022-11-23 15:14:11,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:14:11,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:14:12,003 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_1c0fafd4-3ed9-4031-93df-ff4a21871c73/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-11-23 15:14:12,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:14:12,082 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:14:12,208 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_1c0fafd4-3ed9-4031-93df-ff4a21871c73/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-11-23 15:14:12,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:14:12,295 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:14:12,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12 WrapperNode [2022-11-23 15:14:12,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:14:12,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:14:12,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:14:12,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:14:12,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,412 INFO L138 Inliner]: procedures = 94, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1104 [2022-11-23 15:14:12,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:14:12,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:14:12,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:14:12,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:14:12,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:14:12,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:14:12,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:14:12,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:14:12,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (1/1) ... [2022-11-23 15:14:12,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:14:12,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:12,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:14:12,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:14:12,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:14:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:14:12,596 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:14:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:14:12,596 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:14:12,596 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:14:12,597 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:14:12,597 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 15:14:12,597 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 15:14:12,597 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:14:12,597 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:14:12,598 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 15:14:12,598 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 15:14:12,598 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:14:12,598 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:14:12,598 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:14:12,599 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:14:12,599 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:14:12,600 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:14:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-23 15:14:12,600 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-23 15:14:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:14:12,601 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:14:12,602 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:14:12,602 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:14:12,603 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:14:12,603 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:14:12,603 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:14:12,603 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:14:12,604 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:14:12,605 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:14:12,605 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-23 15:14:12,606 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-23 15:14:12,606 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:14:12,606 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:14:12,606 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:14:12,607 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:14:12,607 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:14:12,607 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:14:12,607 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:14:12,607 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:14:12,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:14:12,608 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:14:12,608 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:14:12,608 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:14:12,609 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:14:12,609 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:14:12,610 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:14:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:14:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:14:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:14:12,611 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:14:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-23 15:14:12,612 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-23 15:14:12,805 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:14:12,807 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:14:14,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:14:14,966 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:14:14,966 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:14:14,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:14:14 BoogieIcfgContainer [2022-11-23 15:14:14,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:14:14,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:14:14,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:14:14,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:14:14,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:14:11" (1/3) ... [2022-11-23 15:14:14,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236fa6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:14:14, skipping insertion in model container [2022-11-23 15:14:14,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:12" (2/3) ... [2022-11-23 15:14:14,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236fa6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:14:14, skipping insertion in model container [2022-11-23 15:14:14,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:14:14" (3/3) ... [2022-11-23 15:14:14,983 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2022-11-23 15:14:15,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:14:15,007 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:14:15,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:14:15,098 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;@6df7ad7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:14:15,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:14:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-23 15:14:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 15:14:15,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:15,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:15,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1751061673, now seen corresponding path program 1 times [2022-11-23 15:14:15,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:15,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036028836] [2022-11-23 15:14:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:15,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:14:15,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036028836] [2022-11-23 15:14:15,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036028836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:15,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:15,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:14:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613326806] [2022-11-23 15:14:15,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:15,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:15,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:14:15,916 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 15:14:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:16,414 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2022-11-23 15:14:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-11-23 15:14:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:16,436 INFO L225 Difference]: With dead ends: 1074 [2022-11-23 15:14:16,436 INFO L226 Difference]: Without dead ends: 709 [2022-11-23 15:14:16,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:14:16,447 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 546 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:16,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1196 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:14:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-23 15:14:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2022-11-23 15:14:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2022-11-23 15:14:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2022-11-23 15:14:16,568 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2022-11-23 15:14:16,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:16,569 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2022-11-23 15:14:16,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 15:14:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2022-11-23 15:14:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 15:14:16,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:16,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:16,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:14:16,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash 26132879, now seen corresponding path program 1 times [2022-11-23 15:14:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:16,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351799108] [2022-11-23 15:14:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:16,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:14:17,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351799108] [2022-11-23 15:14:17,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351799108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:17,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:17,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:14:17,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523960930] [2022-11-23 15:14:17,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:17,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:14:17,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:17,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:14:17,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:14:17,112 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 15:14:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:19,910 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2022-11-23 15:14:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:14:19,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-23 15:14:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:19,923 INFO L225 Difference]: With dead ends: 2177 [2022-11-23 15:14:19,924 INFO L226 Difference]: Without dead ends: 1516 [2022-11-23 15:14:19,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:14:19,929 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1094 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:19,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1259 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 15:14:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-11-23 15:14:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2022-11-23 15:14:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2022-11-23 15:14:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2022-11-23 15:14:20,089 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2022-11-23 15:14:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:20,089 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2022-11-23 15:14:20,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 15:14:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2022-11-23 15:14:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 15:14:20,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:20,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:20,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:14:20,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash 826960521, now seen corresponding path program 1 times [2022-11-23 15:14:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:20,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290132895] [2022-11-23 15:14:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:20,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:14:20,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290132895] [2022-11-23 15:14:20,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290132895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501083936] [2022-11-23 15:14:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:20,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:20,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:20,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:14:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:14:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:14:21,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:21,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501083936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:21,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:21,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-11-23 15:14:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865473870] [2022-11-23 15:14:21,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:21,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:14:21,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:14:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:14:21,017 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:14:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:21,700 INFO L93 Difference]: Finished difference Result 3013 states and 4786 transitions. [2022-11-23 15:14:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:14:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2022-11-23 15:14:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:21,713 INFO L225 Difference]: With dead ends: 3013 [2022-11-23 15:14:21,713 INFO L226 Difference]: Without dead ends: 1650 [2022-11-23 15:14:21,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:14:21,722 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 376 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:21,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2479 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:14:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-23 15:14:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1600. [2022-11-23 15:14:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1079 states have (on average 1.5199258572752548) internal successors, (1640), 1129 states have internal predecessors, (1640), 397 states have call successors, (397), 121 states have call predecessors, (397), 123 states have return successors, (455), 376 states have call predecessors, (455), 391 states have call successors, (455) [2022-11-23 15:14:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2492 transitions. [2022-11-23 15:14:21,841 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2492 transitions. Word has length 90 [2022-11-23 15:14:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:21,841 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 2492 transitions. [2022-11-23 15:14:21,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:14:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2492 transitions. [2022-11-23 15:14:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-23 15:14:21,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:21,849 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:21,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:22,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:22,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1058882386, now seen corresponding path program 1 times [2022-11-23 15:14:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:22,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358812681] [2022-11-23 15:14:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:14:22,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:22,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358812681] [2022-11-23 15:14:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358812681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:22,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:22,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 15:14:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143740496] [2022-11-23 15:14:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:14:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:14:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:14:22,498 INFO L87 Difference]: Start difference. First operand 1600 states and 2492 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 15:14:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:25,416 INFO L93 Difference]: Finished difference Result 1978 states and 3164 transitions. [2022-11-23 15:14:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 15:14:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-23 15:14:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:25,438 INFO L225 Difference]: With dead ends: 1978 [2022-11-23 15:14:25,439 INFO L226 Difference]: Without dead ends: 1976 [2022-11-23 15:14:25,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:14:25,447 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1385 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 3982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:25,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2013 Invalid, 3982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 15:14:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-23 15:14:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1780. [2022-11-23 15:14:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-23 15:14:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2022-11-23 15:14:25,658 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 91 [2022-11-23 15:14:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:25,659 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2022-11-23 15:14:25,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 15:14:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2022-11-23 15:14:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 15:14:25,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:25,664 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-23 15:14:25,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:14:25,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash -158760090, now seen corresponding path program 1 times [2022-11-23 15:14:25,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:25,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511548391] [2022-11-23 15:14:25,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:25,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-23 15:14:25,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511548391] [2022-11-23 15:14:25,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511548391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:25,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:25,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:14:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589060304] [2022-11-23 15:14:25,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:25,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:14:25,865 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:14:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:26,144 INFO L93 Difference]: Finished difference Result 3646 states and 5774 transitions. [2022-11-23 15:14:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:14:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-11-23 15:14:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:26,157 INFO L225 Difference]: With dead ends: 3646 [2022-11-23 15:14:26,157 INFO L226 Difference]: Without dead ends: 1878 [2022-11-23 15:14:26,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:14:26,169 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 30 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:26,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1570 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-23 15:14:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1792. [2022-11-23 15:14:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-23 15:14:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2022-11-23 15:14:26,312 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2022-11-23 15:14:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:26,313 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2022-11-23 15:14:26,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:14:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2022-11-23 15:14:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:14:26,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:26,318 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:26,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:14:26,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash -125520464, now seen corresponding path program 1 times [2022-11-23 15:14:26,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:26,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685803555] [2022-11-23 15:14:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 15:14:26,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:26,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685803555] [2022-11-23 15:14:26,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685803555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:26,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446603697] [2022-11-23 15:14:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:26,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:26,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:26,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:14:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:26,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:14:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:14:27,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:27,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446603697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:27,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:27,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-23 15:14:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48718172] [2022-11-23 15:14:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:27,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:27,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:14:27,010 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:27,420 INFO L93 Difference]: Finished difference Result 3728 states and 5948 transitions. [2022-11-23 15:14:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:14:27,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2022-11-23 15:14:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:27,435 INFO L225 Difference]: With dead ends: 3728 [2022-11-23 15:14:27,435 INFO L226 Difference]: Without dead ends: 1948 [2022-11-23 15:14:27,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:14:27,448 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:27,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:14:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-11-23 15:14:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1948. [2022-11-23 15:14:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-23 15:14:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2022-11-23 15:14:27,637 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2022-11-23 15:14:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:27,638 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2022-11-23 15:14:27,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2022-11-23 15:14:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 15:14:27,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:27,644 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:27,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:27,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:14:27,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 330063092, now seen corresponding path program 1 times [2022-11-23 15:14:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:27,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113656113] [2022-11-23 15:14:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 15:14:28,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113656113] [2022-11-23 15:14:28,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113656113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779343652] [2022-11-23 15:14:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:28,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:28,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:14:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:14:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 15:14:28,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:28,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779343652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:28,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:28,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:14:28,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937983713] [2022-11-23 15:14:28,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:28,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:28,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:28,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:28,489 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:28,904 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2022-11-23 15:14:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:14:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2022-11-23 15:14:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:28,922 INFO L225 Difference]: With dead ends: 4040 [2022-11-23 15:14:28,922 INFO L226 Difference]: Without dead ends: 2104 [2022-11-23 15:14:28,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:14:28,934 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:28,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:14:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-11-23 15:14:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2022-11-23 15:14:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-23 15:14:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2022-11-23 15:14:29,149 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2022-11-23 15:14:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:29,149 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2022-11-23 15:14:29,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2022-11-23 15:14:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-23 15:14:29,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:29,156 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:29,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:29,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:14:29,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash -910319452, now seen corresponding path program 1 times [2022-11-23 15:14:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:29,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943391531] [2022-11-23 15:14:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-23 15:14:29,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:29,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943391531] [2022-11-23 15:14:29,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943391531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:29,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691326460] [2022-11-23 15:14:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:29,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:29,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:29,549 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:29,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:14:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:14:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:14:29,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:29,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691326460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:29,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:29,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:14:29,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849876889] [2022-11-23 15:14:29,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:29,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:29,953 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:30,349 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2022-11-23 15:14:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:14:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2022-11-23 15:14:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:30,366 INFO L225 Difference]: With dead ends: 4352 [2022-11-23 15:14:30,370 INFO L226 Difference]: Without dead ends: 2260 [2022-11-23 15:14:30,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:14:30,407 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:30,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:14:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-11-23 15:14:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-11-23 15:14:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-23 15:14:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2022-11-23 15:14:30,556 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2022-11-23 15:14:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:30,558 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2022-11-23 15:14:30,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2022-11-23 15:14:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 15:14:30,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:30,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:30,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:30,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:30,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1694048112, now seen corresponding path program 1 times [2022-11-23 15:14:30,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:30,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103620202] [2022-11-23 15:14:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:30,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-23 15:14:30,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103620202] [2022-11-23 15:14:30,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103620202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915311767] [2022-11-23 15:14:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:30,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:30,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:30,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:14:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:31,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:14:31,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:14:31,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:31,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915311767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:31,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:31,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:14:31,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672272886] [2022-11-23 15:14:31,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:31,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:31,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:31,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:31,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:31,364 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:31,786 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2022-11-23 15:14:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:14:31,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2022-11-23 15:14:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:31,802 INFO L225 Difference]: With dead ends: 4664 [2022-11-23 15:14:31,802 INFO L226 Difference]: Without dead ends: 2416 [2022-11-23 15:14:31,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:14:31,814 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:31,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:14:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-11-23 15:14:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2022-11-23 15:14:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-23 15:14:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2022-11-23 15:14:31,975 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2022-11-23 15:14:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:31,975 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2022-11-23 15:14:31,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:14:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2022-11-23 15:14:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 15:14:31,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:31,983 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2022-11-23 15:14:31,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:14:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:32,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash -805690754, now seen corresponding path program 1 times [2022-11-23 15:14:32,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093829157] [2022-11-23 15:14:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:32,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 15:14:32,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:32,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093829157] [2022-11-23 15:14:32,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093829157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:32,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883983118] [2022-11-23 15:14:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:32,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:32,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:32,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:32,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:14:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 15:14:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-23 15:14:34,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:28,317 WARN L233 SmtUtils]: Spent 50.31s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 15:16:19,285 WARN L233 SmtUtils]: Spent 49.28s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 15:16:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-23 15:16:21,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883983118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:16:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121894291] [2022-11-23 15:16:21,082 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-11-23 15:16:21,082 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:16:21,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:16:21,092 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:16:21,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:16:24,256 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-11-23 15:16:29,352 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-11-23 15:16:55,001 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 75 for LOIs [2022-11-23 15:16:55,315 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 444 for LOIs [2022-11-23 15:16:56,010 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 508 for LOIs [2022-11-23 15:16:56,179 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 500 for LOIs [2022-11-23 15:16:57,523 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2022-11-23 15:16:57,532 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 120 for LOIs [2022-11-23 15:16:57,562 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 38 for LOIs [2022-11-23 15:16:57,567 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-23 15:17:01,042 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-11-23 15:17:01,629 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-11-23 15:17:01,777 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:25,033 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:17:32,781 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:17:42,067 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 778 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:17:58,925 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:18:05,166 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:18:19,107 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:18:25,310 WARN L233 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:18:31,453 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 613 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:19:23,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64666#(and (= |old(~floorButtons_2~0)| 0) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (= |old(~persons_1~0)| 0) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |old(~floorButtons_0~0)| 0) (<= |timeShift_~tmp~13#1| 1) (= |old(~blocked~0)| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= 1 |timeShift_~tmp~13#1|) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~persons_3~0 0) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (= |old(~floorButtons_4~0)| 0) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (= |old(~persons_0~0)| 0) (= ~doorState~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-23 15:19:23,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:19:23,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:19:23,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 16] total 35 [2022-11-23 15:19:23,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171181745] [2022-11-23 15:19:23,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:19:23,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 15:19:23,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 15:19:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=8567, Unknown=0, NotChecked=0, Total=9506 [2022-11-23 15:19:23,478 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 transitions. Second operand has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-23 15:19:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:55,717 INFO L93 Difference]: Finished difference Result 10515 states and 18062 transitions. [2022-11-23 15:19:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-23 15:19:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) Word has length 139 [2022-11-23 15:19:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:55,765 INFO L225 Difference]: With dead ends: 10515 [2022-11-23 15:19:55,765 INFO L226 Difference]: Without dead ends: 6534 [2022-11-23 15:19:55,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 329 SyntacticMatches, 22 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15892 ImplicationChecksByTransitivity, 147.7s TimeCoverageRelationStatistics Valid=3351, Invalid=36449, Unknown=0, NotChecked=0, Total=39800 [2022-11-23 15:19:55,796 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 7595 mSDsluCounter, 9049 mSDsCounter, 0 mSdLazyCounter, 32537 mSolverCounterSat, 5853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7639 SdHoareTripleChecker+Valid, 9775 SdHoareTripleChecker+Invalid, 38390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5853 IncrementalHoareTripleChecker+Valid, 32537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:55,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7639 Valid, 9775 Invalid, 38390 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5853 Valid, 32537 Invalid, 0 Unknown, 0 Unchecked, 25.5s Time] [2022-11-23 15:19:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-11-23 15:19:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5871. [2022-11-23 15:19:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 4170 states have (on average 1.5553956834532374) internal successors, (6486), 4425 states have internal predecessors, (6486), 1281 states have call successors, (1281), 369 states have call predecessors, (1281), 419 states have return successors, (1648), 1180 states have call predecessors, (1648), 1275 states have call successors, (1648) [2022-11-23 15:19:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9415 transitions. [2022-11-23 15:19:56,495 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9415 transitions. Word has length 139 [2022-11-23 15:19:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:56,495 INFO L495 AbstractCegarLoop]: Abstraction has 5871 states and 9415 transitions. [2022-11-23 15:19:56,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-23 15:19:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9415 transitions. [2022-11-23 15:19:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 15:19:56,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:56,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-23 15:19:56,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:19:56,717 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash 440481421, now seen corresponding path program 1 times [2022-11-23 15:19:56,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:56,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241554659] [2022-11-23 15:19:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-23 15:19:57,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:57,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241554659] [2022-11-23 15:19:57,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241554659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:57,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902316958] [2022-11-23 15:19:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:57,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:57,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:57,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:57,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:19:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:19:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-23 15:19:58,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:58,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902316958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:58,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-11-23 15:19:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146020308] [2022-11-23 15:19:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:19:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:19:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:19:58,063 INFO L87 Difference]: Start difference. First operand 5871 states and 9415 transitions. Second operand has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-23 15:20:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:03,717 INFO L93 Difference]: Finished difference Result 13797 states and 22324 transitions. [2022-11-23 15:20:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:20:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 144 [2022-11-23 15:20:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:03,775 INFO L225 Difference]: With dead ends: 13797 [2022-11-23 15:20:03,775 INFO L226 Difference]: Without dead ends: 7940 [2022-11-23 15:20:03,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:20:03,804 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 2085 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 5211 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 6402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 5211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:03,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 1611 Invalid, 6402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 5211 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 15:20:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7940 states. [2022-11-23 15:20:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7940 to 7626. [2022-11-23 15:20:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 5532 states have (on average 1.546999276934201) internal successors, (8558), 5814 states have internal predecessors, (8558), 1529 states have call successors, (1529), 507 states have call predecessors, (1529), 564 states have return successors, (1957), 1415 states have call predecessors, (1957), 1521 states have call successors, (1957) [2022-11-23 15:20:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 12044 transitions. [2022-11-23 15:20:04,663 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 12044 transitions. Word has length 144 [2022-11-23 15:20:04,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:04,664 INFO L495 AbstractCegarLoop]: Abstraction has 7626 states and 12044 transitions. [2022-11-23 15:20:04,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-23 15:20:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 12044 transitions. [2022-11-23 15:20:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-11-23 15:20:04,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:04,688 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:04,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:04,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:04,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1670188022, now seen corresponding path program 1 times [2022-11-23 15:20:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:04,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695562121] [2022-11-23 15:20:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:04,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 36 proven. 86 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-23 15:20:06,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:06,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695562121] [2022-11-23 15:20:06,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695562121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386932529] [2022-11-23 15:20:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:06,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:06,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:06,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:06,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:20:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 3870 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:20:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-11-23 15:20:07,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:07,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386932529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:07,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:07,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2022-11-23 15:20:07,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383355357] [2022-11-23 15:20:07,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:20:07,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:20:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:20:07,877 INFO L87 Difference]: Start difference. First operand 7626 states and 12044 transitions. Second operand has 10 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-23 15:20:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:11,387 INFO L93 Difference]: Finished difference Result 12968 states and 20387 transitions. [2022-11-23 15:20:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:20:11,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 354 [2022-11-23 15:20:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:11,440 INFO L225 Difference]: With dead ends: 12968 [2022-11-23 15:20:11,441 INFO L226 Difference]: Without dead ends: 6680 [2022-11-23 15:20:11,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-11-23 15:20:11,465 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1235 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:11,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 3365 Invalid, 3893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 3681 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 15:20:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-11-23 15:20:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6542. [2022-11-23 15:20:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6542 states, 4681 states have (on average 1.5088656270027772) internal successors, (7063), 4908 states have internal predecessors, (7063), 1356 states have call successors, (1356), 477 states have call predecessors, (1356), 504 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-11-23 15:20:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 10121 transitions. [2022-11-23 15:20:12,189 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 10121 transitions. Word has length 354 [2022-11-23 15:20:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:12,192 INFO L495 AbstractCegarLoop]: Abstraction has 6542 states and 10121 transitions. [2022-11-23 15:20:12,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-23 15:20:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 10121 transitions. [2022-11-23 15:20:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-23 15:20:12,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:12,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:12,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:20:12,421 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1451935026, now seen corresponding path program 1 times [2022-11-23 15:20:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:12,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650429899] [2022-11-23 15:20:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-23 15:20:12,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650429899] [2022-11-23 15:20:12,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650429899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581677421] [2022-11-23 15:20:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:12,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:12,831 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:12,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:20:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:20:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-23 15:20:13,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581677421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:13,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-23 15:20:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927611694] [2022-11-23 15:20:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:13,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:20:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:20:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:20:13,471 INFO L87 Difference]: Start difference. First operand 6542 states and 10121 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 15:20:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:14,335 INFO L93 Difference]: Finished difference Result 13374 states and 20853 transitions. [2022-11-23 15:20:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:20:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 225 [2022-11-23 15:20:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:14,375 INFO L225 Difference]: With dead ends: 13374 [2022-11-23 15:20:14,376 INFO L226 Difference]: Without dead ends: 6846 [2022-11-23 15:20:14,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:20:14,403 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 205 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:14,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1359 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:20:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2022-11-23 15:20:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6846. [2022-11-23 15:20:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6846 states, 4973 states have (on average 1.52604061934446) internal successors, (7589), 5202 states have internal predecessors, (7589), 1356 states have call successors, (1356), 487 states have call predecessors, (1356), 516 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-11-23 15:20:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 10647 transitions. [2022-11-23 15:20:15,323 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 10647 transitions. Word has length 225 [2022-11-23 15:20:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:15,323 INFO L495 AbstractCegarLoop]: Abstraction has 6846 states and 10647 transitions. [2022-11-23 15:20:15,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 15:20:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 10647 transitions. [2022-11-23 15:20:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-23 15:20:15,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:15,341 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:15,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:15,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:20:15,550 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1782348588, now seen corresponding path program 1 times [2022-11-23 15:20:15,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076555882] [2022-11-23 15:20:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:15,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-23 15:20:15,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:15,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076555882] [2022-11-23 15:20:15,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076555882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:15,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615727741] [2022-11-23 15:20:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:15,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:15,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:15,877 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:15,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:20:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 15:20:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 15:20:17,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:20:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-23 15:20:23,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615727741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:20:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709463330] [2022-11-23 15:20:23,266 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-11-23 15:20:23,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:20:23,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:20:23,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:20:23,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:20:31,291 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 569 for LOIs [2022-11-23 15:20:31,747 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 38 for LOIs [2022-11-23 15:20:32,572 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 182 for LOIs [2022-11-23 15:20:34,660 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-23 15:20:35,042 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 34 for LOIs [2022-11-23 15:20:35,122 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 58 for LOIs [2022-11-23 15:20:35,130 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 59 for LOIs [2022-11-23 15:20:35,224 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2022-11-23 15:20:35,232 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 70 for LOIs [2022-11-23 15:20:35,481 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 56 for LOIs [2022-11-23 15:20:35,494 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 31 for LOIs [2022-11-23 15:20:35,496 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-23 15:20:38,999 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 36 for LOIs [2022-11-23 15:20:39,010 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 35 for LOIs [2022-11-23 15:20:39,020 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 521 for LOIs [2022-11-23 15:20:41,479 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-11-23 15:20:50,392 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 645 for LOIs [2022-11-23 15:20:50,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:05,152 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 645 DAG size of output: 582 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:11,820 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 685 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:19,308 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:26,819 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:40,565 WARN L233 SmtUtils]: Spent 13.26s on a formula simplification. DAG size of input: 792 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:57,173 WARN L233 SmtUtils]: Spent 16.01s on a formula simplification. DAG size of input: 803 DAG size of output: 784 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:54,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '172406#(and (<= |old(~doorState~0)| 2147483647) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1| 0)) (<= 0 (+ |old(~doorState~0)| 2147483648)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|)) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (<= 0 |old(~blocked~0)|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (<= |timeShift_~tmp~13#1| 2147483647) (<= |old(~blocked~0)| 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~doorState~0 2147483647) (<= 0 (+ 2147483648 |timeShift_~tmp~13#1|)) (<= ~blocked~0 1) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (<= 0 ~blocked~0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-23 15:22:54,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:22:54,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:22:54,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 27 [2022-11-23 15:22:54,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000670082] [2022-11-23 15:22:54,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:22:54,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 15:22:54,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 15:22:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=12886, Unknown=0, NotChecked=0, Total=14042 [2022-11-23 15:22:54,165 INFO L87 Difference]: Start difference. First operand 6846 states and 10647 transitions. Second operand has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-11-23 15:23:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:23:30,360 INFO L93 Difference]: Finished difference Result 35773 states and 57395 transitions. [2022-11-23 15:23:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-23 15:23:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) Word has length 226 [2022-11-23 15:23:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:23:30,537 INFO L225 Difference]: With dead ends: 35773 [2022-11-23 15:23:30,537 INFO L226 Difference]: Without dead ends: 27374 [2022-11-23 15:23:30,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 558 SyntacticMatches, 23 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14940 ImplicationChecksByTransitivity, 129.4s TimeCoverageRelationStatistics Valid=2585, Invalid=29635, Unknown=0, NotChecked=0, Total=32220 [2022-11-23 15:23:30,608 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 12022 mSDsluCounter, 7203 mSDsCounter, 0 mSdLazyCounter, 26983 mSolverCounterSat, 11198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12075 SdHoareTripleChecker+Valid, 8326 SdHoareTripleChecker+Invalid, 38181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 11198 IncrementalHoareTripleChecker+Valid, 26983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:23:30,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12075 Valid, 8326 Invalid, 38181 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [11198 Valid, 26983 Invalid, 0 Unknown, 0 Unchecked, 26.9s Time] [2022-11-23 15:23:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27374 states. [2022-11-23 15:23:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27374 to 21718. [2022-11-23 15:23:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21718 states, 15478 states have (on average 1.531787052590774) internal successors, (23709), 16371 states have internal predecessors, (23709), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-23 15:23:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21718 states to 21718 states and 34232 transitions. [2022-11-23 15:23:33,463 INFO L78 Accepts]: Start accepts. Automaton has 21718 states and 34232 transitions. Word has length 226 [2022-11-23 15:23:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:23:33,464 INFO L495 AbstractCegarLoop]: Abstraction has 21718 states and 34232 transitions. [2022-11-23 15:23:33,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-11-23 15:23:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 21718 states and 34232 transitions. [2022-11-23 15:23:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-11-23 15:23:33,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:23:33,494 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:23:33,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:23:33,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:23:33,705 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:23:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:23:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1436498696, now seen corresponding path program 1 times [2022-11-23 15:23:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:23:33,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190903120] [2022-11-23 15:23:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:33,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:23:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 50 proven. 23 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2022-11-23 15:23:34,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:23:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190903120] [2022-11-23 15:23:34,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190903120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:23:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908206183] [2022-11-23 15:23:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:34,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:23:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:23:34,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:23:34,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:23:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 3862 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:23:35,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:23:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-11-23 15:23:35,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:23:35,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908206183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:23:35,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:23:35,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-11-23 15:23:35,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689285206] [2022-11-23 15:23:35,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:23:35,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:23:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:23:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:23:35,719 INFO L87 Difference]: Start difference. First operand 21718 states and 34232 transitions. Second operand has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-11-23 15:23:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:23:40,599 INFO L93 Difference]: Finished difference Result 39795 states and 63141 transitions. [2022-11-23 15:23:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:23:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 355 [2022-11-23 15:23:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:23:40,718 INFO L225 Difference]: With dead ends: 39795 [2022-11-23 15:23:40,718 INFO L226 Difference]: Without dead ends: 21760 [2022-11-23 15:23:40,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-23 15:23:40,794 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1355 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 4094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:23:40,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 3348 Invalid, 4094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 15:23:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21760 states. [2022-11-23 15:23:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21760 to 21190. [2022-11-23 15:23:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21190 states, 14950 states have (on average 1.5120401337792642) internal successors, (22605), 15843 states have internal predecessors, (22605), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-23 15:23:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21190 states to 21190 states and 33128 transitions. [2022-11-23 15:23:43,071 INFO L78 Accepts]: Start accepts. Automaton has 21190 states and 33128 transitions. Word has length 355 [2022-11-23 15:23:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:23:43,073 INFO L495 AbstractCegarLoop]: Abstraction has 21190 states and 33128 transitions. [2022-11-23 15:23:43,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-11-23 15:23:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 21190 states and 33128 transitions. [2022-11-23 15:23:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-23 15:23:43,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:23:43,107 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 10, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:23:43,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:23:43,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:23:43,319 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:23:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:23:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1755226988, now seen corresponding path program 1 times [2022-11-23 15:23:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:23:43,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384643322] [2022-11-23 15:23:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:23:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 37 proven. 110 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2022-11-23 15:23:44,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:23:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384643322] [2022-11-23 15:23:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384643322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:23:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534984417] [2022-11-23 15:23:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:23:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:23:44,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:23:44,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:23:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 4511 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:23:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:23:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2022-11-23 15:23:46,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:23:46,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534984417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:23:46,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:23:46,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-11-23 15:23:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143851041] [2022-11-23 15:23:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:23:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:23:46,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:23:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:23:46,027 INFO L87 Difference]: Start difference. First operand 21190 states and 33128 transitions. Second operand has 10 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2022-11-23 15:23:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:23:50,731 INFO L93 Difference]: Finished difference Result 38739 states and 60933 transitions. [2022-11-23 15:23:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:23:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 438 [2022-11-23 15:23:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:23:50,851 INFO L225 Difference]: With dead ends: 38739 [2022-11-23 15:23:50,852 INFO L226 Difference]: Without dead ends: 21232 [2022-11-23 15:23:50,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-11-23 15:23:50,925 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1226 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:23:50,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 3336 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 15:23:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21232 states. [2022-11-23 15:23:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21232 to 20662. [2022-11-23 15:23:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20662 states, 14422 states have (on average 1.4908473165996394) internal successors, (21501), 15315 states have internal predecessors, (21501), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-23 15:23:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20662 states to 20662 states and 32024 transitions. [2022-11-23 15:23:53,297 INFO L78 Accepts]: Start accepts. Automaton has 20662 states and 32024 transitions. Word has length 438 [2022-11-23 15:23:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:23:53,299 INFO L495 AbstractCegarLoop]: Abstraction has 20662 states and 32024 transitions. [2022-11-23 15:23:53,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2022-11-23 15:23:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 20662 states and 32024 transitions. [2022-11-23 15:23:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-23 15:23:53,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:23:53,327 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:23:53,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:23:53,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:23:53,550 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:23:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:23:53,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2137428725, now seen corresponding path program 1 times [2022-11-23 15:23:53,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:23:53,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967019270] [2022-11-23 15:23:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:23:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-23 15:23:54,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:23:54,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967019270] [2022-11-23 15:23:54,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967019270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:23:54,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996503529] [2022-11-23 15:23:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:54,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:23:54,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:23:54,233 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:23:54,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:23:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:23:54,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:23:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 15:23:55,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:23:55,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996503529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:23:55,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:23:55,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-11-23 15:23:55,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552527192] [2022-11-23 15:23:55,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:23:55,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:23:55,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:23:55,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:23:55,048 INFO L87 Difference]: Start difference. First operand 20662 states and 32024 transitions. Second operand has 10 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-23 15:24:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:00,325 INFO L93 Difference]: Finished difference Result 37683 states and 58725 transitions. [2022-11-23 15:24:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:24:00,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 221 [2022-11-23 15:24:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:00,428 INFO L225 Difference]: With dead ends: 37683 [2022-11-23 15:24:00,429 INFO L226 Difference]: Without dead ends: 20704 [2022-11-23 15:24:00,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:24:00,495 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1177 mSDsluCounter, 2573 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 3324 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:00,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 3324 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 15:24:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2022-11-23 15:24:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20134. [2022-11-23 15:24:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20134 states, 13894 states have (on average 1.468043759896358) internal successors, (20397), 14787 states have internal predecessors, (20397), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-23 15:24:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20134 states to 20134 states and 30920 transitions. [2022-11-23 15:24:02,698 INFO L78 Accepts]: Start accepts. Automaton has 20134 states and 30920 transitions. Word has length 221 [2022-11-23 15:24:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:02,698 INFO L495 AbstractCegarLoop]: Abstraction has 20134 states and 30920 transitions. [2022-11-23 15:24:02,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-23 15:24:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 20134 states and 30920 transitions. [2022-11-23 15:24:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-11-23 15:24:02,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:02,730 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:24:02,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:02,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:24:02,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1273589950, now seen corresponding path program 1 times [2022-11-23 15:24:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991922439] [2022-11-23 15:24:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 50 proven. 41 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2022-11-23 15:24:03,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991922439] [2022-11-23 15:24:03,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991922439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474334820] [2022-11-23 15:24:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:03,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:03,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:24:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:04,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 3859 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:24:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-11-23 15:24:05,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:24:05,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474334820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:05,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:24:05,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-11-23 15:24:05,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994930361] [2022-11-23 15:24:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:05,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:24:05,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:24:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:24:05,258 INFO L87 Difference]: Start difference. First operand 20134 states and 30920 transitions. Second operand has 10 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-11-23 15:24:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:10,320 INFO L93 Difference]: Finished difference Result 38180 states and 59430 transitions. [2022-11-23 15:24:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:24:10,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 361 [2022-11-23 15:24:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:10,430 INFO L225 Difference]: With dead ends: 38180 [2022-11-23 15:24:10,430 INFO L226 Difference]: Without dead ends: 20640 [2022-11-23 15:24:10,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-23 15:24:10,495 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 1128 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 3730 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:10,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 3322 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3730 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 15:24:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20640 states. [2022-11-23 15:24:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20640 to 20070. [2022-11-23 15:24:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20070 states, 13840 states have (on average 1.4604768786127167) internal successors, (20213), 14733 states have internal predecessors, (20213), 4692 states have call successors, (4692), 1423 states have call predecessors, (4692), 1537 states have return successors, (5811), 4161 states have call predecessors, (5811), 4666 states have call successors, (5811) [2022-11-23 15:24:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20070 states to 20070 states and 30716 transitions. [2022-11-23 15:24:13,296 INFO L78 Accepts]: Start accepts. Automaton has 20070 states and 30716 transitions. Word has length 361 [2022-11-23 15:24:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:13,296 INFO L495 AbstractCegarLoop]: Abstraction has 20070 states and 30716 transitions. [2022-11-23 15:24:13,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-11-23 15:24:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 20070 states and 30716 transitions. [2022-11-23 15:24:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-23 15:24:13,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:13,311 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:13,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:13,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:24:13,523 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2053678225, now seen corresponding path program 1 times [2022-11-23 15:24:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621659332] [2022-11-23 15:24:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 27 proven. 52 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-23 15:24:16,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:16,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621659332] [2022-11-23 15:24:16,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621659332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:16,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642380957] [2022-11-23 15:24:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:16,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:16,462 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:16,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:24:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 15:24:17,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 15:24:18,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:24:18,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642380957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:18,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:24:18,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [25] total 36 [2022-11-23 15:24:18,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43013971] [2022-11-23 15:24:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:18,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:24:18,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:18,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:24:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 15:24:18,381 INFO L87 Difference]: Start difference. First operand 20070 states and 30716 transitions. Second operand has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-23 15:24:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:29,284 INFO L93 Difference]: Finished difference Result 31323 states and 48564 transitions. [2022-11-23 15:24:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 15:24:29,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 235 [2022-11-23 15:24:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:29,410 INFO L225 Difference]: With dead ends: 31323 [2022-11-23 15:24:29,411 INFO L226 Difference]: Without dead ends: 31017 [2022-11-23 15:24:29,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 15:24:29,433 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 3062 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 6659 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3223 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 8120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 6659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:29,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3223 Valid, 2256 Invalid, 8120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1461 Valid, 6659 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 15:24:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2022-11-23 15:24:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 28895. [2022-11-23 15:24:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28895 states, 19847 states have (on average 1.457348717690331) internal successors, (28924), 21079 states have internal predecessors, (28924), 6876 states have call successors, (6876), 1973 states have call predecessors, (6876), 2171 states have return successors, (8727), 6136 states have call predecessors, (8727), 6842 states have call successors, (8727) [2022-11-23 15:24:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28895 states to 28895 states and 44527 transitions. [2022-11-23 15:24:32,972 INFO L78 Accepts]: Start accepts. Automaton has 28895 states and 44527 transitions. Word has length 235 [2022-11-23 15:24:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:32,973 INFO L495 AbstractCegarLoop]: Abstraction has 28895 states and 44527 transitions. [2022-11-23 15:24:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-23 15:24:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 28895 states and 44527 transitions. [2022-11-23 15:24:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-23 15:24:32,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:32,995 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:33,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:33,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:33,206 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:33,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1169482875, now seen corresponding path program 1 times [2022-11-23 15:24:33,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:33,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867158619] [2022-11-23 15:24:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:33,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 15:24:35,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:35,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867158619] [2022-11-23 15:24:35,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867158619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:35,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002668521] [2022-11-23 15:24:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:35,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:35,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:35,474 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:35,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c0fafd4-3ed9-4031-93df-ff4a21871c73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 15:24:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 15:24:36,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-23 15:24:36,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:24:36,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002668521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:36,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:24:36,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 22 [2022-11-23 15:24:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512151016] [2022-11-23 15:24:36,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:36,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 15:24:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 15:24:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-23 15:24:36,862 INFO L87 Difference]: Start difference. First operand 28895 states and 44527 transitions. Second operand has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-11-23 15:24:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:42,960 INFO L93 Difference]: Finished difference Result 41461 states and 64330 transitions. [2022-11-23 15:24:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:24:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) Word has length 235 [2022-11-23 15:24:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:43,082 INFO L225 Difference]: With dead ends: 41461 [2022-11-23 15:24:43,083 INFO L226 Difference]: Without dead ends: 29612 [2022-11-23 15:24:43,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:24:43,138 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 714 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 3876 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 4254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:43,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1267 Invalid, 4254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3876 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 15:24:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29612 states.