./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:37:45,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:37:45,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:37:45,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:37:45,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:37:45,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:37:45,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:37:45,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:37:45,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:37:45,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:37:45,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:37:45,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:37:45,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:37:45,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:37:45,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:37:45,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:37:45,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:37:45,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:37:45,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:37:45,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:37:45,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:37:45,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:37:45,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:37:45,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:37:45,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:37:45,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:37:45,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:37:45,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:37:45,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:37:45,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:37:45,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:37:45,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:37:45,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:37:45,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:37:45,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:37:45,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:37:45,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:37:45,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:37:45,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:37:45,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:37:45,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:37:45,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:37:45,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:37:45,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:37:45,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:37:45,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:37:45,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:37:45,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:37:45,425 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:37:45,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:37:45,426 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:37:45,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:37:45,426 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:37:45,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:37:45,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:37:45,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:37:45,427 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:37:45,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:37:45,427 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:37:45,427 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:37:45,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:37:45,428 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:37:45,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:37:45,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:37:45,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:37:45,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:37:45,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:37:45,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:37:45,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:37:45,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:37:45,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:37:45,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:37:45,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:37:45,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:37:45,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:37:45,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:37:45,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:37:45,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:37:45,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:37:45,432 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:37:45,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:37:45,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:37:45,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:37:45,433 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_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2022-12-14 08:37:45,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:37:45,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:37:45,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:37:45,657 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:37:45,657 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:37:45,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-12-14 08:37:48,236 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:37:48,492 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:37:48,492 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-12-14 08:37:48,507 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/data/3a3bc3a8d/302f2b0bf58c4310bd3172a78684b3af/FLAG153ed0011 [2022-12-14 08:37:48,812 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/data/3a3bc3a8d/302f2b0bf58c4310bd3172a78684b3af [2022-12-14 08:37:48,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:37:48,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:37:48,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:37:48,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:37:48,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:37:48,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:37:48" (1/1) ... [2022-12-14 08:37:48,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e6f1b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:48, skipping insertion in model container [2022-12-14 08:37:48,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:37:48" (1/1) ... [2022-12-14 08:37:48,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:37:48,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:37:49,221 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_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-12-14 08:37:49,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:37:49,270 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:37:49,353 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_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-12-14 08:37:49,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:37:49,385 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:37:49,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49 WrapperNode [2022-12-14 08:37:49,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:37:49,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:37:49,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:37:49,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:37:49,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,442 INFO L138 Inliner]: procedures = 90, calls = 338, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 818 [2022-12-14 08:37:49,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:37:49,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:37:49,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:37:49,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:37:49,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,487 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:37:49,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:37:49,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:37:49,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:37:49,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (1/1) ... [2022-12-14 08:37:49,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:37:49,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:49,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:37:49,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:37:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-12-14 08:37:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-12-14 08:37:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:37:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 08:37:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 08:37:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 08:37:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 08:37:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-12-14 08:37:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-12-14 08:37:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 08:37:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 08:37:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 08:37:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 08:37:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 08:37:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 08:37:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 08:37:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 08:37:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 08:37:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 08:37:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 08:37:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 08:37:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 08:37:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 08:37:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 08:37:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 08:37:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 08:37:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 08:37:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 08:37:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 08:37:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 08:37:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 08:37:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 08:37:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 08:37:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 08:37:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 08:37:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 08:37:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 08:37:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 08:37:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 08:37:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:37:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 08:37:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 08:37:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 08:37:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 08:37:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 08:37:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 08:37:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 08:37:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 08:37:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 08:37:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 08:37:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:37:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:37:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 08:37:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 08:37:49,686 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:37:49,688 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:37:50,491 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:37:51,037 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:37:51,038 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 08:37:51,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:37:51 BoogieIcfgContainer [2022-12-14 08:37:51,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:37:51,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:37:51,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:37:51,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:37:51,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:37:48" (1/3) ... [2022-12-14 08:37:51,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbd6f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:37:51, skipping insertion in model container [2022-12-14 08:37:51,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:49" (2/3) ... [2022-12-14 08:37:51,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbd6f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:37:51, skipping insertion in model container [2022-12-14 08:37:51,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:37:51" (3/3) ... [2022-12-14 08:37:51,046 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2022-12-14 08:37:51,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:37:51,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:37:51,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:37:51,110 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;@55c0d3b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:37:51,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:37:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-12-14 08:37:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 08:37:51,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:51,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:51,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1031292210, now seen corresponding path program 1 times [2022-12-14 08:37:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327049987] [2022-12-14 08:37:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:37:51,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:51,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327049987] [2022-12-14 08:37:51,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327049987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:51,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:51,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:37:51,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505169056] [2022-12-14 08:37:51,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:37:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:37:51,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:37:51,670 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 08:37:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:52,228 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2022-12-14 08:37:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:37:52,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-12-14 08:37:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:52,249 INFO L225 Difference]: With dead ends: 1204 [2022-12-14 08:37:52,249 INFO L226 Difference]: Without dead ends: 800 [2022-12-14 08:37:52,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:37:52,261 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3629 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 4449 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:52,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 4449 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:37:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-12-14 08:37:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2022-12-14 08:37:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2022-12-14 08:37:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2022-12-14 08:37:52,355 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2022-12-14 08:37:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:52,356 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2022-12-14 08:37:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 08:37:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2022-12-14 08:37:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 08:37:52,360 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:52,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:52,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:37:52,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash -922227807, now seen corresponding path program 1 times [2022-12-14 08:37:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559886721] [2022-12-14 08:37:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:37:52,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559886721] [2022-12-14 08:37:52,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559886721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:52,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:52,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:37:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453186913] [2022-12-14 08:37:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:52,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:37:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:37:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:37:52,660 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 08:37:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:52,859 INFO L93 Difference]: Finished difference Result 1219 states and 1953 transitions. [2022-12-14 08:37:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:37:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2022-12-14 08:37:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:52,865 INFO L225 Difference]: With dead ends: 1219 [2022-12-14 08:37:52,865 INFO L226 Difference]: Without dead ends: 829 [2022-12-14 08:37:52,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:37:52,869 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:52,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3795 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:37:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-12-14 08:37:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 798. [2022-12-14 08:37:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 559 states have (on average 1.5706618962432917) internal successors, (878), 586 states have internal predecessors, (878), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 189 states have call predecessors, (203), 184 states have call successors, (203) [2022-12-14 08:37:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1269 transitions. [2022-12-14 08:37:52,919 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1269 transitions. Word has length 87 [2022-12-14 08:37:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:52,919 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1269 transitions. [2022-12-14 08:37:52,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 08:37:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1269 transitions. [2022-12-14 08:37:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 08:37:52,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:52,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:37:52,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1596189311, now seen corresponding path program 1 times [2022-12-14 08:37:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:52,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096608474] [2022-12-14 08:37:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:37:53,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:53,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096608474] [2022-12-14 08:37:53,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096608474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:53,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:53,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:37:53,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476782336] [2022-12-14 08:37:53,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:53,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:37:53,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:53,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:37:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:53,502 INFO L87 Difference]: Start difference. First operand 798 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 08:37:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:54,769 INFO L93 Difference]: Finished difference Result 3107 states and 5034 transitions. [2022-12-14 08:37:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:37:54,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2022-12-14 08:37:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:54,778 INFO L225 Difference]: With dead ends: 3107 [2022-12-14 08:37:54,778 INFO L226 Difference]: Without dead ends: 2324 [2022-12-14 08:37:54,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:37:54,783 INFO L413 NwaCegarLoop]: 1243 mSDtfsCounter, 1586 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:54,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1590 Valid, 2582 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 08:37:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2022-12-14 08:37:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2010. [2022-12-14 08:37:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1459 states have (on average 1.5496915695681974) internal successors, (2261), 1511 states have internal predecessors, (2261), 422 states have call successors, (422), 117 states have call predecessors, (422), 128 states have return successors, (518), 419 states have call predecessors, (518), 414 states have call successors, (518) [2022-12-14 08:37:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3201 transitions. [2022-12-14 08:37:54,875 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3201 transitions. Word has length 87 [2022-12-14 08:37:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:54,875 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 3201 transitions. [2022-12-14 08:37:54,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 08:37:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3201 transitions. [2022-12-14 08:37:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 08:37:54,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:54,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:54,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:37:54,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2027657070, now seen corresponding path program 1 times [2022-12-14 08:37:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:54,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809098781] [2022-12-14 08:37:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:54,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:37:55,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:55,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809098781] [2022-12-14 08:37:55,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809098781] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:55,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:55,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:37:55,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814678309] [2022-12-14 08:37:55,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:55,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:37:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:37:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:37:55,043 INFO L87 Difference]: Start difference. First operand 2010 states and 3201 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 08:37:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:55,311 INFO L93 Difference]: Finished difference Result 3142 states and 5038 transitions. [2022-12-14 08:37:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:37:55,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-12-14 08:37:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:55,320 INFO L225 Difference]: With dead ends: 3142 [2022-12-14 08:37:55,321 INFO L226 Difference]: Without dead ends: 2129 [2022-12-14 08:37:55,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:37:55,327 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 32 mSDsluCounter, 3139 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:55,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3781 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:37:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-12-14 08:37:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2069. [2022-12-14 08:37:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1502 states have (on average 1.5459387483355527) internal successors, (2322), 1549 states have internal predecessors, (2322), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 440 states have call predecessors, (559), 426 states have call successors, (559) [2022-12-14 08:37:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3315 transitions. [2022-12-14 08:37:55,429 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3315 transitions. Word has length 86 [2022-12-14 08:37:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:55,430 INFO L495 AbstractCegarLoop]: Abstraction has 2069 states and 3315 transitions. [2022-12-14 08:37:55,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 08:37:55,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3315 transitions. [2022-12-14 08:37:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 08:37:55,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:55,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:55,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:37:55,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1958765446, now seen corresponding path program 1 times [2022-12-14 08:37:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:55,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473733093] [2022-12-14 08:37:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:55,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:37:55,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473733093] [2022-12-14 08:37:55,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473733093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:55,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:55,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:37:55,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003204215] [2022-12-14 08:37:55,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:37:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:37:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:37:55,567 INFO L87 Difference]: Start difference. First operand 2069 states and 3315 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 08:37:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:56,474 INFO L93 Difference]: Finished difference Result 4534 states and 7324 transitions. [2022-12-14 08:37:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:37:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 94 [2022-12-14 08:37:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:56,489 INFO L225 Difference]: With dead ends: 4534 [2022-12-14 08:37:56,490 INFO L226 Difference]: Without dead ends: 3111 [2022-12-14 08:37:56,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:37:56,500 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1146 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:56,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2136 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:37:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-12-14 08:37:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3070. [2022-12-14 08:37:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2199 states have (on average 1.4943155979990905) internal successors, (3286), 2271 states have internal predecessors, (3286), 651 states have call successors, (651), 194 states have call predecessors, (651), 219 states have return successors, (882), 662 states have call predecessors, (882), 640 states have call successors, (882) [2022-12-14 08:37:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4819 transitions. [2022-12-14 08:37:56,679 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4819 transitions. Word has length 94 [2022-12-14 08:37:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:56,680 INFO L495 AbstractCegarLoop]: Abstraction has 3070 states and 4819 transitions. [2022-12-14 08:37:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 08:37:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4819 transitions. [2022-12-14 08:37:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 08:37:56,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:56,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:37:56,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -857551168, now seen corresponding path program 1 times [2022-12-14 08:37:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:56,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87391387] [2022-12-14 08:37:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:37:56,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87391387] [2022-12-14 08:37:56,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87391387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:56,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:56,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:37:56,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771813361] [2022-12-14 08:37:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:37:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:37:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:56,837 INFO L87 Difference]: Start difference. First operand 3070 states and 4819 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:37:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:57,373 INFO L93 Difference]: Finished difference Result 5309 states and 8380 transitions. [2022-12-14 08:37:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:37:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2022-12-14 08:37:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:57,387 INFO L225 Difference]: With dead ends: 5309 [2022-12-14 08:37:57,387 INFO L226 Difference]: Without dead ends: 3111 [2022-12-14 08:37:57,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:37:57,397 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 519 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:57,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 2839 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:37:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-12-14 08:37:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3086. [2022-12-14 08:37:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2208 states have (on average 1.4923007246376812) internal successors, (3295), 2284 states have internal predecessors, (3295), 655 states have call successors, (655), 197 states have call predecessors, (655), 222 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-12-14 08:37:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4843 transitions. [2022-12-14 08:37:57,535 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4843 transitions. Word has length 95 [2022-12-14 08:37:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:57,536 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 4843 transitions. [2022-12-14 08:37:57,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:37:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4843 transitions. [2022-12-14 08:37:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 08:37:57,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:57,538 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:37:57,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:37:57,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1821105811, now seen corresponding path program 1 times [2022-12-14 08:37:57,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:57,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911108429] [2022-12-14 08:37:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:57,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:37:57,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:57,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911108429] [2022-12-14 08:37:57,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911108429] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:57,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797670402] [2022-12-14 08:37:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:57,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:57,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:37:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:37:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:37:57,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:37:57,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797670402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:57,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:37:57,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-14 08:37:57,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493618744] [2022-12-14 08:37:57,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:57,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:37:57,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:37:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:37:57,905 INFO L87 Difference]: Start difference. First operand 3086 states and 4843 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:37:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:58,228 INFO L93 Difference]: Finished difference Result 6211 states and 9938 transitions. [2022-12-14 08:37:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:37:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2022-12-14 08:37:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:58,247 INFO L225 Difference]: With dead ends: 6211 [2022-12-14 08:37:58,247 INFO L226 Difference]: Without dead ends: 3140 [2022-12-14 08:37:58,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:58,268 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:58,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:37:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2022-12-14 08:37:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2022-12-14 08:37:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2253 states have (on average 1.486462494451842) internal successors, (3349), 2329 states have internal predecessors, (3349), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-12-14 08:37:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4897 transitions. [2022-12-14 08:37:58,427 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4897 transitions. Word has length 99 [2022-12-14 08:37:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:58,427 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 4897 transitions. [2022-12-14 08:37:58,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:37:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4897 transitions. [2022-12-14 08:37:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 08:37:58,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:58,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:58,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:37:58,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:37:58,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2019049805, now seen corresponding path program 1 times [2022-12-14 08:37:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:58,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752934515] [2022-12-14 08:37:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:37:58,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752934515] [2022-12-14 08:37:58,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752934515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114977227] [2022-12-14 08:37:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:58,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:58,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:58,790 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:58,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:37:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:37:59,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:37:59,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:37:59,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114977227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:59,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:37:59,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 08:37:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409777914] [2022-12-14 08:37:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:59,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:37:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:37:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:37:59,067 INFO L87 Difference]: Start difference. First operand 3140 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:37:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:59,339 INFO L93 Difference]: Finished difference Result 6292 states and 9956 transitions. [2022-12-14 08:37:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:37:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2022-12-14 08:37:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:59,353 INFO L225 Difference]: With dead ends: 6292 [2022-12-14 08:37:59,353 INFO L226 Difference]: Without dead ends: 3131 [2022-12-14 08:37:59,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:37:59,366 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:59,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:37:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-12-14 08:37:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2022-12-14 08:37:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2244 states have (on average 1.4763814616755793) internal successors, (3313), 2320 states have internal predecessors, (3313), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-12-14 08:37:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4861 transitions. [2022-12-14 08:37:59,516 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4861 transitions. Word has length 102 [2022-12-14 08:37:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:59,516 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 4861 transitions. [2022-12-14 08:37:59,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:37:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4861 transitions. [2022-12-14 08:37:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 08:37:59,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:59,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:59,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:37:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:59,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash -363820887, now seen corresponding path program 1 times [2022-12-14 08:37:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070292970] [2022-12-14 08:37:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:37:59,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070292970] [2022-12-14 08:37:59,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070292970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179746559] [2022-12-14 08:37:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:59,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:59,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:38:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:38:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:00,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:38:00,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179746559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:00,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:38:00,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-12-14 08:38:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765256546] [2022-12-14 08:38:00,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:00,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:38:00,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:38:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:38:00,203 INFO L87 Difference]: Start difference. First operand 3131 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:38:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:01,022 INFO L93 Difference]: Finished difference Result 8109 states and 13165 transitions. [2022-12-14 08:38:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:38:01,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2022-12-14 08:38:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:01,043 INFO L225 Difference]: With dead ends: 8109 [2022-12-14 08:38:01,043 INFO L226 Difference]: Without dead ends: 4993 [2022-12-14 08:38:01,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:38:01,059 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 609 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:01,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 2210 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:38:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-12-14 08:38:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4931. [2022-12-14 08:38:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3556 states have (on average 1.4569741282339708) internal successors, (5181), 3678 states have internal predecessors, (5181), 1011 states have call successors, (1011), 324 states have call predecessors, (1011), 363 states have return successors, (1624), 1022 states have call predecessors, (1624), 994 states have call successors, (1624) [2022-12-14 08:38:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7816 transitions. [2022-12-14 08:38:01,286 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7816 transitions. Word has length 103 [2022-12-14 08:38:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:01,286 INFO L495 AbstractCegarLoop]: Abstraction has 4931 states and 7816 transitions. [2022-12-14 08:38:01,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:38:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7816 transitions. [2022-12-14 08:38:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 08:38:01,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:01,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:01,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 08:38:01,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:01,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1220009055, now seen corresponding path program 1 times [2022-12-14 08:38:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:01,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050955736] [2022-12-14 08:38:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:38:01,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050955736] [2022-12-14 08:38:01,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050955736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375996410] [2022-12-14 08:38:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:01,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:01,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:01,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:38:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:38:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:38:02,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:38:02,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375996410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:02,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:38:02,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 08:38:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798055335] [2022-12-14 08:38:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:02,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:38:02,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:02,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:38:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:38:02,094 INFO L87 Difference]: Start difference. First operand 4931 states and 7816 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:38:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:03,025 INFO L93 Difference]: Finished difference Result 11020 states and 18004 transitions. [2022-12-14 08:38:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:38:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2022-12-14 08:38:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:03,046 INFO L225 Difference]: With dead ends: 11020 [2022-12-14 08:38:03,046 INFO L226 Difference]: Without dead ends: 6104 [2022-12-14 08:38:03,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:38:03,061 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 699 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 3631 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:03,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 3631 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:38:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2022-12-14 08:38:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6080. [2022-12-14 08:38:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4412 states have (on average 1.4320036264732547) internal successors, (6318), 4548 states have internal predecessors, (6318), 1174 states have call successors, (1174), 449 states have call predecessors, (1174), 493 states have return successors, (2598), 1175 states have call predecessors, (2598), 1145 states have call successors, (2598) [2022-12-14 08:38:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10090 transitions. [2022-12-14 08:38:03,359 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 10090 transitions. Word has length 104 [2022-12-14 08:38:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:03,360 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 10090 transitions. [2022-12-14 08:38:03,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:38:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 10090 transitions. [2022-12-14 08:38:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 08:38:03,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:03,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:03,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:38:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:38:03,563 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1328976188, now seen corresponding path program 1 times [2022-12-14 08:38:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:03,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114449980] [2022-12-14 08:38:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:03,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:38:03,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114449980] [2022-12-14 08:38:03,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114449980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449432111] [2022-12-14 08:38:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:03,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:03,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:03,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:38:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:03,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:38:03,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:38:03,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:38:03,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449432111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:03,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:38:03,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-14 08:38:03,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933273628] [2022-12-14 08:38:03,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:38:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:03,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:38:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:38:03,939 INFO L87 Difference]: Start difference. First operand 6080 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:38:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:04,321 INFO L93 Difference]: Finished difference Result 11905 states and 20369 transitions. [2022-12-14 08:38:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:38:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 107 [2022-12-14 08:38:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:04,341 INFO L225 Difference]: With dead ends: 11905 [2022-12-14 08:38:04,341 INFO L226 Difference]: Without dead ends: 5678 [2022-12-14 08:38:04,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:38:04,373 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 5 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:04,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1189 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:38:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-12-14 08:38:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5479. [2022-12-14 08:38:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 3922 states have (on average 1.4280979092299848) internal successors, (5601), 4050 states have internal predecessors, (5601), 1109 states have call successors, (1109), 413 states have call predecessors, (1109), 447 states have return successors, (2203), 1108 states have call predecessors, (2203), 1084 states have call successors, (2203) [2022-12-14 08:38:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8913 transitions. [2022-12-14 08:38:04,684 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8913 transitions. Word has length 107 [2022-12-14 08:38:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:04,684 INFO L495 AbstractCegarLoop]: Abstraction has 5479 states and 8913 transitions. [2022-12-14 08:38:04,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:38:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8913 transitions. [2022-12-14 08:38:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 08:38:04,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:04,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:04,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 08:38:04,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 08:38:04,889 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1426990397, now seen corresponding path program 1 times [2022-12-14 08:38:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:04,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978224497] [2022-12-14 08:38:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:04,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:38:05,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:05,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978224497] [2022-12-14 08:38:05,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978224497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:05,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844217629] [2022-12-14 08:38:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:05,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:05,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:05,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:05,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:38:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:38:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:05,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:38:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844217629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:38:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732172441] [2022-12-14 08:38:05,460 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2022-12-14 08:38:05,460 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:38:05,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:38:05,467 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:38:05,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:38:09,955 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 08:38:11,535 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 08:38:11,610 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-12-14 08:38:14,201 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-12-14 08:38:20,737 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-12-14 08:38:21,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:38:42,629 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:38:52,676 WARN L233 SmtUtils]: Spent 9.71s on a formula simplification. DAG size of input: 844 DAG size of output: 752 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:39:16,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [732172441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:16,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:39:16,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2022-12-14 08:39:16,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425962333] [2022-12-14 08:39:16,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:16,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 08:39:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 08:39:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-12-14 08:39:16,411 INFO L87 Difference]: Start difference. First operand 5479 states and 8913 transitions. Second operand has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 08:39:31,864 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 752 DAG size of output: 559 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:39:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:53,158 INFO L93 Difference]: Finished difference Result 10981 states and 17875 transitions. [2022-12-14 08:39:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 08:39:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2022-12-14 08:39:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:53,178 INFO L225 Difference]: With dead ends: 10981 [2022-12-14 08:39:53,178 INFO L226 Difference]: Without dead ends: 5525 [2022-12-14 08:39:53,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 73.0s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 08:39:53,205 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 34 mSDsluCounter, 3889 mSDsCounter, 0 mSdLazyCounter, 3610 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4513 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:53,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4513 Invalid, 3621 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 3610 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2022-12-14 08:39:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2022-12-14 08:39:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5499. [2022-12-14 08:39:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3938 states have (on average 1.4268664296597258) internal successors, (5619), 4065 states have internal predecessors, (5619), 1111 states have call successors, (1111), 415 states have call predecessors, (1111), 449 states have return successors, (2205), 1111 states have call predecessors, (2205), 1086 states have call successors, (2205) [2022-12-14 08:39:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 8935 transitions. [2022-12-14 08:39:53,510 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 8935 transitions. Word has length 111 [2022-12-14 08:39:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:53,511 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 8935 transitions. [2022-12-14 08:39:53,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 08:39:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 8935 transitions. [2022-12-14 08:39:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 08:39:53,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:53,513 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:39:53,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:39:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 08:39:53,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1246387647, now seen corresponding path program 1 times [2022-12-14 08:39:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:53,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5736374] [2022-12-14 08:39:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:39:53,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5736374] [2022-12-14 08:39:53,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5736374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:53,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918133004] [2022-12-14 08:39:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:53,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:53,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:39:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:39:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:39:54,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:39:54,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918133004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:54,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:39:54,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-12-14 08:39:54,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784200773] [2022-12-14 08:39:54,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:54,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:39:54,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:54,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:39:54,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:39:54,066 INFO L87 Difference]: Start difference. First operand 5499 states and 8935 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:39:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:54,677 INFO L93 Difference]: Finished difference Result 11386 states and 19601 transitions. [2022-12-14 08:39:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:54,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2022-12-14 08:39:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:54,703 INFO L225 Difference]: With dead ends: 11386 [2022-12-14 08:39:54,703 INFO L226 Difference]: Without dead ends: 6539 [2022-12-14 08:39:54,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:39:54,745 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 252 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:54,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 2553 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:39:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2022-12-14 08:39:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6323. [2022-12-14 08:39:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 4401 states have (on average 1.4314928425357873) internal successors, (6300), 4639 states have internal predecessors, (6300), 1454 states have call successors, (1454), 415 states have call predecessors, (1454), 467 states have return successors, (2858), 1433 states have call predecessors, (2858), 1429 states have call successors, (2858) [2022-12-14 08:39:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10612 transitions. [2022-12-14 08:39:55,087 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10612 transitions. Word has length 112 [2022-12-14 08:39:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:55,088 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10612 transitions. [2022-12-14 08:39:55,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 08:39:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10612 transitions. [2022-12-14 08:39:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 08:39:55,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:55,092 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:39:55,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:39:55,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:55,293 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash 230978612, now seen corresponding path program 1 times [2022-12-14 08:39:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:55,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554159870] [2022-12-14 08:39:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:39:55,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554159870] [2022-12-14 08:39:55,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554159870] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997600180] [2022-12-14 08:39:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:55,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:55,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:55,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:39:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:39:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:39:55,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:39:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:39:55,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997600180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:39:55,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3771977] [2022-12-14 08:39:55,804 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-12-14 08:39:55,804 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:39:55,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:39:55,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:39:55,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:39:59,758 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 08:40:54,760 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-12-14 08:40:54,975 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 451 for LOIs [2022-12-14 08:40:55,081 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 457 for LOIs [2022-12-14 08:40:55,191 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 86 for LOIs [2022-12-14 08:40:55,285 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 81 for LOIs [2022-12-14 08:40:55,291 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 08:40:55,371 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-12-14 08:40:57,975 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-12-14 08:41:11,783 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-12-14 08:41:12,298 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:41:33,004 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:41:43,373 WARN L233 SmtUtils]: Spent 9.95s on a formula simplification. DAG size of input: 865 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:42:14,420 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 685 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:42:20,640 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 688 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:42:26,906 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 683 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:42:38,436 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 694 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:42:44,073 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 703 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:42:50,861 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 712 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:42:57,634 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 717 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:43:03,294 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 716 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:43:14,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [3771977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:43:14,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:43:14,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [5, 6, 7] total 57 [2022-12-14 08:43:14,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808634196] [2022-12-14 08:43:14,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:43:14,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 08:43:14,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:43:14,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 08:43:14,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 08:43:14,747 INFO L87 Difference]: Start difference. First operand 6323 states and 10612 transitions. Second operand has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 08:43:33,360 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 746 DAG size of output: 558 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:44:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:26,055 INFO L93 Difference]: Finished difference Result 12663 states and 21270 transitions. [2022-12-14 08:44:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 08:44:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) Word has length 117 [2022-12-14 08:44:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:26,079 INFO L225 Difference]: With dead ends: 12663 [2022-12-14 08:44:26,080 INFO L226 Difference]: Without dead ends: 6377 [2022-12-14 08:44:26,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 296 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 142.3s TimeCoverageRelationStatistics Valid=330, Invalid=3452, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 08:44:26,108 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 41 mSDsluCounter, 10048 mSDsCounter, 0 mSdLazyCounter, 13602 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 10680 SdHoareTripleChecker+Invalid, 13608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:26,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 10680 Invalid, 13608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 13602 Invalid, 0 Unknown, 0 Unchecked, 50.8s Time] [2022-12-14 08:44:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2022-12-14 08:44:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6337. [2022-12-14 08:44:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 4409 states have (on average 1.4304831027443865) internal successors, (6307), 4648 states have internal predecessors, (6307), 1456 states have call successors, (1456), 418 states have call predecessors, (1456), 471 states have return successors, (2862), 1435 states have call predecessors, (2862), 1431 states have call successors, (2862) [2022-12-14 08:44:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 10625 transitions. [2022-12-14 08:44:26,603 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 10625 transitions. Word has length 117 [2022-12-14 08:44:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:26,603 INFO L495 AbstractCegarLoop]: Abstraction has 6337 states and 10625 transitions. [2022-12-14 08:44:26,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 08:44:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 10625 transitions. [2022-12-14 08:44:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:44:26,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:26,608 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:44:26,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:44:26,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 08:44:26,808 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash 446357089, now seen corresponding path program 1 times [2022-12-14 08:44:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521202977] [2022-12-14 08:44:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:26,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:44:26,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521202977] [2022-12-14 08:44:26,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521202977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378774132] [2022-12-14 08:44:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:26,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:26,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:26,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:44:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:27,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:44:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:44:27,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:44:27,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378774132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:27,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643997064] [2022-12-14 08:44:27,304 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-12-14 08:44:27,304 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:27,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:27,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:27,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:31,221 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 08:45:36,855 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-12-14 08:45:38,108 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 464 for LOIs [2022-12-14 08:45:40,714 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 526 for LOIs [2022-12-14 08:45:41,101 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 457 for LOIs [2022-12-14 08:45:41,222 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 105 for LOIs [2022-12-14 08:45:41,523 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 97 for LOIs [2022-12-14 08:45:41,541 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 08:45:41,739 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-12-14 08:45:44,739 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-12-14 08:46:30,139 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-12-14 08:46:30,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:46:52,740 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:47:06,251 WARN L233 SmtUtils]: Spent 12.58s on a formula simplification. DAG size of input: 922 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:47:37,156 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 526 DAG size of output: 445 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:47:43,472 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 565 DAG size of output: 460 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:47:49,554 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 685 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:47:55,466 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 688 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:48:00,952 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 683 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:48:11,247 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 694 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:48:22,750 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 712 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:48:28,916 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 717 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:48:34,738 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 716 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:49:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [643997064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:13,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:49:13,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [5, 6, 7] total 66 [2022-12-14 08:49:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770209411] [2022-12-14 08:49:13,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:13,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 08:49:13,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 08:49:13,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=3934, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 08:49:13,499 INFO L87 Difference]: Start difference. First operand 6337 states and 10625 transitions. Second operand has 54 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 33 states have internal predecessors, (71), 16 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-12-14 08:49:31,000 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 746 DAG size of output: 558 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:50:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:50:28,620 INFO L93 Difference]: Finished difference Result 11838 states and 19989 transitions. [2022-12-14 08:50:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-14 08:50:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 33 states have internal predecessors, (71), 16 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 116 [2022-12-14 08:50:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:50:28,642 INFO L225 Difference]: With dead ends: 11838 [2022-12-14 08:50:28,642 INFO L226 Difference]: Without dead ends: 6433 [2022-12-14 08:50:28,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 277 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 189.2s TimeCoverageRelationStatistics Valid=409, Invalid=4847, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 08:50:28,668 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 100 mSDsluCounter, 9120 mSDsCounter, 0 mSdLazyCounter, 13096 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 9725 SdHoareTripleChecker+Invalid, 13115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 13096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:50:28,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 9725 Invalid, 13115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 13096 Invalid, 0 Unknown, 0 Unchecked, 47.8s Time] [2022-12-14 08:50:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2022-12-14 08:50:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 6395. [2022-12-14 08:50:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6395 states, 4454 states have (on average 1.427031881454872) internal successors, (6356), 4694 states have internal predecessors, (6356), 1463 states have call successors, (1463), 422 states have call predecessors, (1463), 477 states have return successors, (2870), 1443 states have call predecessors, (2870), 1438 states have call successors, (2870) [2022-12-14 08:50:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 10689 transitions. [2022-12-14 08:50:29,090 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 10689 transitions. Word has length 116 [2022-12-14 08:50:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:50:29,090 INFO L495 AbstractCegarLoop]: Abstraction has 6395 states and 10689 transitions. [2022-12-14 08:50:29,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 33 states have internal predecessors, (71), 16 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-12-14 08:50:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 10689 transitions. [2022-12-14 08:50:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 08:50:29,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:50:29,093 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:50:29,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:50:29,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 08:50:29,295 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:50:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:50:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1205593552, now seen corresponding path program 1 times [2022-12-14 08:50:29,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:50:29,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094673847] [2022-12-14 08:50:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:29,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:50:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 08:50:29,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:50:29,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094673847] [2022-12-14 08:50:29,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094673847] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:50:29,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119854335] [2022-12-14 08:50:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:29,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:50:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:50:29,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:50:29,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40cbd2fb-5200-40b9-bf68-143c8ef2fe99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:50:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:50:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:50:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:50:29,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:50:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:50:29,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119854335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:50:29,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492261054] [2022-12-14 08:50:29,883 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2022-12-14 08:50:29,883 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:50:29,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:50:29,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:50:29,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:50:33,800 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 08:51:45,450 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-12-14 08:51:46,660 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 464 for LOIs