./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label20.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_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/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_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/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_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/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 1405ce2683e9fc1142823331bc73f3fedb50a2caefebf44893a593622c3225ed --- 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 08:37:34,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:37:34,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:37:34,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:37:34,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:37:34,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:37:34,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:37:34,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:37:34,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:37:34,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:37:34,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:37:34,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:37:34,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:37:34,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:37:34,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:37:34,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:37:34,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:37:34,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:37:34,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:37:34,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:37:34,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:37:34,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:37:34,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:37:34,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:37:34,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:37:34,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:37:34,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:37:34,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:37:34,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:37:34,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:37:34,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:37:34,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:37:34,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:37:34,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:37:34,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:37:34,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:37:34,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:37:34,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:37:34,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:37:34,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:37:34,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:37:34,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:37:34,450 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:37:34,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:37:34,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:37:34,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:37:34,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:37:34,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:37:34,451 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:37:34,452 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:37:34,452 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:37:34,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:37:34,452 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:37:34,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:37:34,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:37:34,452 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:37:34,453 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:37:34,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:37:34,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:37:34,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:37:34,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:37:34,454 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:37:34,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:37:34,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:37:34,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:37:34,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:37:34,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:37:34,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:37:34,455 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:37:34,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:37:34,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:37:34,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:37:34,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:37:34,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:37:34,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:37:34,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:37:34,456 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:37:34,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:37:34,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:37:34,456 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:37:34,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:37:34,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:37:34,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:37:34,457 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_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1405ce2683e9fc1142823331bc73f3fedb50a2caefebf44893a593622c3225ed [2022-12-14 08:37:34,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:37:34,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:37:34,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:37:34,637 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:37:34,638 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:37:34,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2022-12-14 08:37:37,137 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:37:37,403 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:37:37,404 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2022-12-14 08:37:37,417 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/data/bc500d72b/694babd2c7264c1ba576bc25851e0880/FLAGacaf6221b [2022-12-14 08:37:37,698 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/data/bc500d72b/694babd2c7264c1ba576bc25851e0880 [2022-12-14 08:37:37,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:37:37,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:37:37,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:37:37,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:37:37,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:37:37,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:37:37" (1/1) ... [2022-12-14 08:37:37,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258f83c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:37, skipping insertion in model container [2022-12-14 08:37:37,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:37:37" (1/1) ... [2022-12-14 08:37:37,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:37:37,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:37:38,193 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_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/sv-benchmarks/c/eca-rers2012/Problem03_label20.c[60555,60568] [2022-12-14 08:37:38,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:37:38,223 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:37:38,404 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_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/sv-benchmarks/c/eca-rers2012/Problem03_label20.c[60555,60568] [2022-12-14 08:37:38,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:37:38,421 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:37:38,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38 WrapperNode [2022-12-14 08:37:38,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:37:38,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:37:38,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:37:38,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:37:38,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,489 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 08:37:38,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:37:38,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:37:38,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:37:38,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:37:38,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:37:38,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:37:38,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:37:38,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:37:38,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (1/1) ... [2022-12-14 08:37:38,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:37:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:38,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:37:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:37:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:37:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:37:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:37:38,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:37:38,700 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:37:38,702 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:37:40,064 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:37:40,280 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:37:40,281 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:37:40,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:37:40 BoogieIcfgContainer [2022-12-14 08:37:40,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:37:40,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:37:40,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:37:40,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:37:40,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:37:37" (1/3) ... [2022-12-14 08:37:40,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@902532e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:37:40, skipping insertion in model container [2022-12-14 08:37:40,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:37:38" (2/3) ... [2022-12-14 08:37:40,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@902532e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:37:40, skipping insertion in model container [2022-12-14 08:37:40,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:37:40" (3/3) ... [2022-12-14 08:37:40,289 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20.c [2022-12-14 08:37:40,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:37:40,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:37:40,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:37:40,351 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;@353f414e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:37:40,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:37:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 08:37:40,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:40,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:40,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash 209352954, now seen corresponding path program 1 times [2022-12-14 08:37:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:40,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90354425] [2022-12-14 08:37:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:40,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:41,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:41,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90354425] [2022-12-14 08:37:41,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90354425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:41,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:41,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:41,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047909015] [2022-12-14 08:37:41,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:41,113 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:41,769 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 08:37:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:41,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 08:37:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:41,780 INFO L225 Difference]: With dead ends: 440 [2022-12-14 08:37:41,780 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 08:37:41,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:41,785 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:41,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 08:37:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 08:37:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8680555555555556) internal successors, (538), 288 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 538 transitions. [2022-12-14 08:37:41,836 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 538 transitions. Word has length 143 [2022-12-14 08:37:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:41,837 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 538 transitions. [2022-12-14 08:37:41,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 538 transitions. [2022-12-14 08:37:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 08:37:41,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:41,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:41,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:37:41,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1305717870, now seen corresponding path program 1 times [2022-12-14 08:37:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:41,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639645762] [2022-12-14 08:37:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:41,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:42,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:42,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639645762] [2022-12-14 08:37:42,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639645762] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:42,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:42,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:42,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068012562] [2022-12-14 08:37:42,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:42,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:42,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:42,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:42,123 INFO L87 Difference]: Start difference. First operand 289 states and 538 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:42,710 INFO L93 Difference]: Finished difference Result 865 states and 1612 transitions. [2022-12-14 08:37:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-12-14 08:37:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:42,713 INFO L225 Difference]: With dead ends: 865 [2022-12-14 08:37:42,713 INFO L226 Difference]: Without dead ends: 577 [2022-12-14 08:37:42,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:42,716 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 180 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:42,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 38 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-14 08:37:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-12-14 08:37:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8414634146341464) internal successors, (1057), 574 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1057 transitions. [2022-12-14 08:37:42,748 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1057 transitions. Word has length 147 [2022-12-14 08:37:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:42,748 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1057 transitions. [2022-12-14 08:37:42,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1057 transitions. [2022-12-14 08:37:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 08:37:42,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:42,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:42,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:37:42,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash 14521108, now seen corresponding path program 1 times [2022-12-14 08:37:42,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:42,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465764130] [2022-12-14 08:37:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:42,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465764130] [2022-12-14 08:37:42,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465764130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:42,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:42,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710376359] [2022-12-14 08:37:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:42,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:42,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:42,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:42,992 INFO L87 Difference]: Start difference. First operand 575 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:43,615 INFO L93 Difference]: Finished difference Result 1721 states and 3168 transitions. [2022-12-14 08:37:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-12-14 08:37:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:43,621 INFO L225 Difference]: With dead ends: 1721 [2022-12-14 08:37:43,621 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 08:37:43,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:43,623 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:43,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 37 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 08:37:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 08:37:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7260034904013961) internal successors, (1978), 1146 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1978 transitions. [2022-12-14 08:37:43,652 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1978 transitions. Word has length 153 [2022-12-14 08:37:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:43,652 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1978 transitions. [2022-12-14 08:37:43,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1978 transitions. [2022-12-14 08:37:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 08:37:43,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:43,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:43,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:37:43,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1655739277, now seen corresponding path program 1 times [2022-12-14 08:37:43,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:43,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070632108] [2022-12-14 08:37:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:43,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:43,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070632108] [2022-12-14 08:37:43,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070632108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:43,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9609907] [2022-12-14 08:37:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:43,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:43,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:43,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:37:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:43,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:37:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:37:44,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:37:44,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9609907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:44,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:37:44,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 08:37:44,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578919715] [2022-12-14 08:37:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:44,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:44,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:44,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:44,005 INFO L87 Difference]: Start difference. First operand 1147 states and 1978 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:44,623 INFO L93 Difference]: Finished difference Result 3437 states and 5931 transitions. [2022-12-14 08:37:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-12-14 08:37:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:44,629 INFO L225 Difference]: With dead ends: 3437 [2022-12-14 08:37:44,630 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 08:37:44,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:44,632 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 160 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:44,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 49 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 08:37:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1719. [2022-12-14 08:37:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.648428405122235) internal successors, (2832), 1718 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2832 transitions. [2022-12-14 08:37:44,662 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2832 transitions. Word has length 154 [2022-12-14 08:37:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:44,663 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2832 transitions. [2022-12-14 08:37:44,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2832 transitions. [2022-12-14 08:37:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 08:37:44,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:44,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:44,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:37:44,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:44,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash 259314834, now seen corresponding path program 1 times [2022-12-14 08:37:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:44,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386427795] [2022-12-14 08:37:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:44,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:37:45,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:45,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386427795] [2022-12-14 08:37:45,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386427795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:45,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:45,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:37:45,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905738011] [2022-12-14 08:37:45,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:45,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:45,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:45,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:45,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:45,034 INFO L87 Difference]: Start difference. First operand 1719 states and 2832 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:45,668 INFO L93 Difference]: Finished difference Result 5153 states and 8493 transitions. [2022-12-14 08:37:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:45,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-12-14 08:37:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:45,677 INFO L225 Difference]: With dead ends: 5153 [2022-12-14 08:37:45,677 INFO L226 Difference]: Without dead ends: 3435 [2022-12-14 08:37:45,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:45,681 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:45,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 238 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-12-14 08:37:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-12-14 08:37:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.4857309260337799) internal successors, (5102), 3434 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5102 transitions. [2022-12-14 08:37:45,731 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5102 transitions. Word has length 162 [2022-12-14 08:37:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:45,732 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 5102 transitions. [2022-12-14 08:37:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5102 transitions. [2022-12-14 08:37:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 08:37:45,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:45,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:45,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:37:45,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1982523831, now seen corresponding path program 1 times [2022-12-14 08:37:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:45,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136361062] [2022-12-14 08:37:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:45,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:45,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136361062] [2022-12-14 08:37:45,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136361062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:45,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:45,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007720558] [2022-12-14 08:37:45,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:45,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:45,856 INFO L87 Difference]: Start difference. First operand 3435 states and 5102 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:46,447 INFO L93 Difference]: Finished difference Result 10160 states and 15108 transitions. [2022-12-14 08:37:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-12-14 08:37:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:46,464 INFO L225 Difference]: With dead ends: 10160 [2022-12-14 08:37:46,464 INFO L226 Difference]: Without dead ends: 6726 [2022-12-14 08:37:46,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:46,468 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:46,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 58 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:37:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2022-12-14 08:37:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 6724. [2022-12-14 08:37:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 1.4262977837275026) internal successors, (9589), 6723 states have internal predecessors, (9589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 9589 transitions. [2022-12-14 08:37:46,594 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 9589 transitions. Word has length 166 [2022-12-14 08:37:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:46,594 INFO L495 AbstractCegarLoop]: Abstraction has 6724 states and 9589 transitions. [2022-12-14 08:37:46,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 9589 transitions. [2022-12-14 08:37:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 08:37:46,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:46,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:46,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:37:46,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash -13279776, now seen corresponding path program 1 times [2022-12-14 08:37:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:46,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895723202] [2022-12-14 08:37:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:46,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:46,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:46,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895723202] [2022-12-14 08:37:46,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895723202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:46,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:46,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:46,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276633062] [2022-12-14 08:37:46,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:46,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:46,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:46,876 INFO L87 Difference]: Start difference. First operand 6724 states and 9589 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:47,506 INFO L93 Difference]: Finished difference Result 16736 states and 23714 transitions. [2022-12-14 08:37:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-12-14 08:37:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:47,524 INFO L225 Difference]: With dead ends: 16736 [2022-12-14 08:37:47,524 INFO L226 Difference]: Without dead ends: 10013 [2022-12-14 08:37:47,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:47,528 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 136 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:47,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 41 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10013 states. [2022-12-14 08:37:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10013 to 10013. [2022-12-14 08:37:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10013 states, 10012 states have (on average 1.4041150619256892) internal successors, (14058), 10012 states have internal predecessors, (14058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 14058 transitions. [2022-12-14 08:37:47,639 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 14058 transitions. Word has length 171 [2022-12-14 08:37:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:47,639 INFO L495 AbstractCegarLoop]: Abstraction has 10013 states and 14058 transitions. [2022-12-14 08:37:47,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 14058 transitions. [2022-12-14 08:37:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-14 08:37:47,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:47,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:37:47,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1879474855, now seen corresponding path program 1 times [2022-12-14 08:37:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:47,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357903564] [2022-12-14 08:37:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 08:37:47,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:47,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357903564] [2022-12-14 08:37:47,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357903564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:47,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:47,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:47,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137643311] [2022-12-14 08:37:47,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:47,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:47,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:47,805 INFO L87 Difference]: Start difference. First operand 10013 states and 14058 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:48,387 INFO L93 Difference]: Finished difference Result 26174 states and 37233 transitions. [2022-12-14 08:37:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:48,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2022-12-14 08:37:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:48,407 INFO L225 Difference]: With dead ends: 26174 [2022-12-14 08:37:48,408 INFO L226 Difference]: Without dead ends: 16162 [2022-12-14 08:37:48,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:48,414 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 137 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:48,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 104 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:37:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2022-12-14 08:37:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 14303. [2022-12-14 08:37:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14303 states, 14302 states have (on average 1.3273668018458957) internal successors, (18984), 14302 states have internal predecessors, (18984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14303 states to 14303 states and 18984 transitions. [2022-12-14 08:37:48,593 INFO L78 Accepts]: Start accepts. Automaton has 14303 states and 18984 transitions. Word has length 190 [2022-12-14 08:37:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:48,593 INFO L495 AbstractCegarLoop]: Abstraction has 14303 states and 18984 transitions. [2022-12-14 08:37:48,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 14303 states and 18984 transitions. [2022-12-14 08:37:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-12-14 08:37:48,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:48,612 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 08:37:48,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:37:48,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2106436683, now seen corresponding path program 1 times [2022-12-14 08:37:48,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:48,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976491800] [2022-12-14 08:37:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:48,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:37:48,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:48,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976491800] [2022-12-14 08:37:48,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976491800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:48,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:48,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:37:48,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636582893] [2022-12-14 08:37:48,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:48,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:48,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:48,871 INFO L87 Difference]: Start difference. First operand 14303 states and 18984 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:49,589 INFO L93 Difference]: Finished difference Result 34039 states and 45943 transitions. [2022-12-14 08:37:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:49,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-12-14 08:37:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:49,608 INFO L225 Difference]: With dead ends: 34039 [2022-12-14 08:37:49,608 INFO L226 Difference]: Without dead ends: 19737 [2022-12-14 08:37:49,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:49,616 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:49,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 255 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2022-12-14 08:37:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 18879. [2022-12-14 08:37:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18879 states, 18878 states have (on average 1.2482254476109758) internal successors, (23564), 18878 states have internal predecessors, (23564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18879 states to 18879 states and 23564 transitions. [2022-12-14 08:37:49,830 INFO L78 Accepts]: Start accepts. Automaton has 18879 states and 23564 transitions. Word has length 203 [2022-12-14 08:37:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:49,830 INFO L495 AbstractCegarLoop]: Abstraction has 18879 states and 23564 transitions. [2022-12-14 08:37:49,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 18879 states and 23564 transitions. [2022-12-14 08:37:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-12-14 08:37:49,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:49,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:37:49,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2143628969, now seen corresponding path program 1 times [2022-12-14 08:37:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:49,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682701306] [2022-12-14 08:37:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 08:37:50,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:50,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682701306] [2022-12-14 08:37:50,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682701306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:50,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675498104] [2022-12-14 08:37:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:50,114 INFO L87 Difference]: Start difference. First operand 18879 states and 23564 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:50,724 INFO L93 Difference]: Finished difference Result 38615 states and 48101 transitions. [2022-12-14 08:37:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:50,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-12-14 08:37:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:50,746 INFO L225 Difference]: With dead ends: 38615 [2022-12-14 08:37:50,746 INFO L226 Difference]: Without dead ends: 19737 [2022-12-14 08:37:50,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:50,757 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:50,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 107 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:37:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2022-12-14 08:37:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 19737. [2022-12-14 08:37:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19737 states, 19736 states have (on average 1.2430583704904743) internal successors, (24533), 19736 states have internal predecessors, (24533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 24533 transitions. [2022-12-14 08:37:50,997 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 24533 transitions. Word has length 205 [2022-12-14 08:37:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:50,997 INFO L495 AbstractCegarLoop]: Abstraction has 19737 states and 24533 transitions. [2022-12-14 08:37:50,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 24533 transitions. [2022-12-14 08:37:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-14 08:37:51,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:51,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:51,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:37:51,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1334402471, now seen corresponding path program 1 times [2022-12-14 08:37:51,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:51,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882335372] [2022-12-14 08:37:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:37:51,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:51,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882335372] [2022-12-14 08:37:51,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882335372] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:51,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:51,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:37:51,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063268363] [2022-12-14 08:37:51,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:51,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:51,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:51,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:51,237 INFO L87 Difference]: Start difference. First operand 19737 states and 24533 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:51,824 INFO L93 Difference]: Finished difference Result 44337 states and 55501 transitions. [2022-12-14 08:37:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-12-14 08:37:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:51,849 INFO L225 Difference]: With dead ends: 44337 [2022-12-14 08:37:51,849 INFO L226 Difference]: Without dead ends: 25173 [2022-12-14 08:37:51,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:51,858 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:51,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 127 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:37:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25173 states. [2022-12-14 08:37:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25173 to 24027. [2022-12-14 08:37:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24027 states, 24026 states have (on average 1.2627153916590361) internal successors, (30338), 24026 states have internal predecessors, (30338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24027 states to 24027 states and 30338 transitions. [2022-12-14 08:37:52,223 INFO L78 Accepts]: Start accepts. Automaton has 24027 states and 30338 transitions. Word has length 218 [2022-12-14 08:37:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:52,223 INFO L495 AbstractCegarLoop]: Abstraction has 24027 states and 30338 transitions. [2022-12-14 08:37:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 24027 states and 30338 transitions. [2022-12-14 08:37:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-12-14 08:37:52,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:52,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:52,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:37:52,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash 307036466, now seen corresponding path program 1 times [2022-12-14 08:37:52,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007053590] [2022-12-14 08:37:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:52,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 08:37:52,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:52,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007053590] [2022-12-14 08:37:52,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007053590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:52,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161361776] [2022-12-14 08:37:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:52,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:52,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:52,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:52,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:37:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:37:52,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 08:37:52,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:37:52,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161361776] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:52,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:37:52,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 08:37:52,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96012437] [2022-12-14 08:37:52,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:52,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:52,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:52,732 INFO L87 Difference]: Start difference. First operand 24027 states and 30338 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:53,127 INFO L93 Difference]: Finished difference Result 67789 states and 86188 transitions. [2022-12-14 08:37:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-12-14 08:37:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:53,167 INFO L225 Difference]: With dead ends: 67789 [2022-12-14 08:37:53,167 INFO L226 Difference]: Without dead ends: 44478 [2022-12-14 08:37:53,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:53,182 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 208 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:53,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 540 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:37:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44478 states. [2022-12-14 08:37:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44478 to 43904. [2022-12-14 08:37:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43904 states, 43903 states have (on average 1.2464068514680091) internal successors, (54721), 43903 states have internal predecessors, (54721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43904 states to 43904 states and 54721 transitions. [2022-12-14 08:37:53,737 INFO L78 Accepts]: Start accepts. Automaton has 43904 states and 54721 transitions. Word has length 222 [2022-12-14 08:37:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:53,738 INFO L495 AbstractCegarLoop]: Abstraction has 43904 states and 54721 transitions. [2022-12-14 08:37:53,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 43904 states and 54721 transitions. [2022-12-14 08:37:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-12-14 08:37:53,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:53,753 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:53,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:37:53,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 08:37:53,954 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1393394931, now seen corresponding path program 1 times [2022-12-14 08:37:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:53,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719260137] [2022-12-14 08:37:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 08:37:54,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719260137] [2022-12-14 08:37:54,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719260137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541502116] [2022-12-14 08:37:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:54,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:54,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:54,216 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:54,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:37:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:37:54,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:37:54,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:37:54,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541502116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:54,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:37:54,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 08:37:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970432025] [2022-12-14 08:37:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:54,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:54,508 INFO L87 Difference]: Start difference. First operand 43904 states and 54721 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:55,287 INFO L93 Difference]: Finished difference Result 96673 states and 120551 transitions. [2022-12-14 08:37:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-12-14 08:37:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:55,339 INFO L225 Difference]: With dead ends: 96673 [2022-12-14 08:37:55,339 INFO L226 Difference]: Without dead ends: 52913 [2022-12-14 08:37:55,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:55,360 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:55,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 235 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:37:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52913 states. [2022-12-14 08:37:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52913 to 52913. [2022-12-14 08:37:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52913 states, 52912 states have (on average 1.2328772301179316) internal successors, (65234), 52912 states have internal predecessors, (65234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52913 states to 52913 states and 65234 transitions. [2022-12-14 08:37:55,975 INFO L78 Accepts]: Start accepts. Automaton has 52913 states and 65234 transitions. Word has length 224 [2022-12-14 08:37:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:55,975 INFO L495 AbstractCegarLoop]: Abstraction has 52913 states and 65234 transitions. [2022-12-14 08:37:55,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 52913 states and 65234 transitions. [2022-12-14 08:37:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-14 08:37:55,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:55,999 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:56,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 08:37:56,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 08:37:56,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1211197682, now seen corresponding path program 1 times [2022-12-14 08:37:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:56,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900289351] [2022-12-14 08:37:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:56,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 116 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 08:37:56,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900289351] [2022-12-14 08:37:56,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900289351] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774672594] [2022-12-14 08:37:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:56,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:56,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:56,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:56,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:37:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:37:56,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 08:37:56,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:37:56,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774672594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:56,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:37:56,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 08:37:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276380682] [2022-12-14 08:37:56,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:56,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:56,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:56,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:56,863 INFO L87 Difference]: Start difference. First operand 52913 states and 65234 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:57,423 INFO L93 Difference]: Finished difference Result 96816 states and 119300 transitions. [2022-12-14 08:37:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-12-14 08:37:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:57,460 INFO L225 Difference]: With dead ends: 96816 [2022-12-14 08:37:57,460 INFO L226 Difference]: Without dead ends: 44333 [2022-12-14 08:37:57,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:37:57,479 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:57,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:37:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44333 states. [2022-12-14 08:37:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44333 to 42331. [2022-12-14 08:37:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42331 states, 42330 states have (on average 1.2178360500826837) internal successors, (51551), 42330 states have internal predecessors, (51551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42331 states to 42331 states and 51551 transitions. [2022-12-14 08:37:58,011 INFO L78 Accepts]: Start accepts. Automaton has 42331 states and 51551 transitions. Word has length 242 [2022-12-14 08:37:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:58,011 INFO L495 AbstractCegarLoop]: Abstraction has 42331 states and 51551 transitions. [2022-12-14 08:37:58,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 42331 states and 51551 transitions. [2022-12-14 08:37:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-14 08:37:58,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:58,024 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:58,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 08:37:58,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:58,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1516305789, now seen corresponding path program 1 times [2022-12-14 08:37:58,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:58,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177980676] [2022-12-14 08:37:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:37:58,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:58,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177980676] [2022-12-14 08:37:58,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177980676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:58,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:58,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:37:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39216260] [2022-12-14 08:37:58,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:58,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:37:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:58,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:37:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:58,437 INFO L87 Difference]: Start difference. First operand 42331 states and 51551 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:59,167 INFO L93 Difference]: Finished difference Result 93241 states and 114369 transitions. [2022-12-14 08:37:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:37:59,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-12-14 08:37:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:59,213 INFO L225 Difference]: With dead ends: 93241 [2022-12-14 08:37:59,213 INFO L226 Difference]: Without dead ends: 49338 [2022-12-14 08:37:59,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:37:59,226 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 92 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:59,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 244 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:37:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49338 states. [2022-12-14 08:37:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49338 to 44905. [2022-12-14 08:37:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44905 states, 44904 states have (on average 1.1571574915375022) internal successors, (51961), 44904 states have internal predecessors, (51961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44905 states to 44905 states and 51961 transitions. [2022-12-14 08:37:59,753 INFO L78 Accepts]: Start accepts. Automaton has 44905 states and 51961 transitions. Word has length 242 [2022-12-14 08:37:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:59,753 INFO L495 AbstractCegarLoop]: Abstraction has 44905 states and 51961 transitions. [2022-12-14 08:37:59,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:37:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 44905 states and 51961 transitions. [2022-12-14 08:37:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-12-14 08:37:59,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:59,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:59,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 08:37:59,769 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1937895527, now seen corresponding path program 1 times [2022-12-14 08:37:59,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:59,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796531598] [2022-12-14 08:37:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:59,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:00,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:00,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796531598] [2022-12-14 08:38:00,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796531598] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:00,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456798839] [2022-12-14 08:38:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:00,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:00,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:00,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:00,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:38:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:38:00,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 08:38:00,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:38:00,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456798839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:00,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:38:00,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 08:38:00,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617379348] [2022-12-14 08:38:00,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:00,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:38:00,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:38:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:38:00,518 INFO L87 Difference]: Start difference. First operand 44905 states and 51961 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:01,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:01,287 INFO L93 Difference]: Finished difference Result 92669 states and 107963 transitions. [2022-12-14 08:38:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:38:01,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-12-14 08:38:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:01,335 INFO L225 Difference]: With dead ends: 92669 [2022-12-14 08:38:01,335 INFO L226 Difference]: Without dead ends: 48480 [2022-12-14 08:38:01,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:38:01,359 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:01,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 174 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:38:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48480 states. [2022-12-14 08:38:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48480 to 48194. [2022-12-14 08:38:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48194 states, 48193 states have (on average 1.1591309941277779) internal successors, (55862), 48193 states have internal predecessors, (55862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48194 states to 48194 states and 55862 transitions. [2022-12-14 08:38:02,086 INFO L78 Accepts]: Start accepts. Automaton has 48194 states and 55862 transitions. Word has length 249 [2022-12-14 08:38:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:02,086 INFO L495 AbstractCegarLoop]: Abstraction has 48194 states and 55862 transitions. [2022-12-14 08:38:02,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48194 states and 55862 transitions. [2022-12-14 08:38:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-12-14 08:38:02,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:02,097 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:02,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 08:38:02,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:38:02,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash -214664974, now seen corresponding path program 1 times [2022-12-14 08:38:02,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:02,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617228507] [2022-12-14 08:38:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 08:38:02,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617228507] [2022-12-14 08:38:02,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617228507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:02,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886726365] [2022-12-14 08:38:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:02,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:02,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:02,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:38:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:02,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:38:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 08:38:02,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:38:02,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886726365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:02,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:38:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 08:38:02,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203534696] [2022-12-14 08:38:02,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:02,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:38:02,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:02,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:38:02,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:38:02,895 INFO L87 Difference]: Start difference. First operand 48194 states and 55862 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:03,672 INFO L93 Difference]: Finished difference Result 103537 states and 120471 transitions. [2022-12-14 08:38:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:38:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-12-14 08:38:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:03,724 INFO L225 Difference]: With dead ends: 103537 [2022-12-14 08:38:03,724 INFO L226 Difference]: Without dead ends: 56059 [2022-12-14 08:38:03,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:38:03,743 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:03,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 239 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:38:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56059 states. [2022-12-14 08:38:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56059 to 53485. [2022-12-14 08:38:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53485 states, 53484 states have (on average 1.1594121606461745) internal successors, (62010), 53484 states have internal predecessors, (62010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53485 states to 53485 states and 62010 transitions. [2022-12-14 08:38:04,477 INFO L78 Accepts]: Start accepts. Automaton has 53485 states and 62010 transitions. Word has length 252 [2022-12-14 08:38:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:04,478 INFO L495 AbstractCegarLoop]: Abstraction has 53485 states and 62010 transitions. [2022-12-14 08:38:04,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 53485 states and 62010 transitions. [2022-12-14 08:38:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-12-14 08:38:04,491 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:04,491 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:04,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:38:04,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:38:04,693 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2042838658, now seen corresponding path program 1 times [2022-12-14 08:38:04,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:04,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915907618] [2022-12-14 08:38:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:04,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:38:04,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915907618] [2022-12-14 08:38:04,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915907618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:04,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:38:04,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:38:04,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828561255] [2022-12-14 08:38:04,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:04,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:38:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:38:04,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:38:04,942 INFO L87 Difference]: Start difference. First operand 53485 states and 62010 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:05,986 INFO L93 Difference]: Finished difference Result 107827 states and 125309 transitions. [2022-12-14 08:38:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:38:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2022-12-14 08:38:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:06,037 INFO L225 Difference]: With dead ends: 107827 [2022-12-14 08:38:06,037 INFO L226 Difference]: Without dead ends: 54772 [2022-12-14 08:38:06,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:38:06,061 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:06,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 35 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:38:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54772 states. [2022-12-14 08:38:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54772 to 53485. [2022-12-14 08:38:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53485 states, 53484 states have (on average 1.1637873008750281) internal successors, (62244), 53484 states have internal predecessors, (62244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53485 states to 53485 states and 62244 transitions. [2022-12-14 08:38:06,766 INFO L78 Accepts]: Start accepts. Automaton has 53485 states and 62244 transitions. Word has length 258 [2022-12-14 08:38:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:06,767 INFO L495 AbstractCegarLoop]: Abstraction has 53485 states and 62244 transitions. [2022-12-14 08:38:06,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:38:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 53485 states and 62244 transitions. [2022-12-14 08:38:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-12-14 08:38:06,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:06,780 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:06,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 08:38:06,781 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash -829665315, now seen corresponding path program 1 times [2022-12-14 08:38:06,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311835933] [2022-12-14 08:38:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:06,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 08:38:07,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:07,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311835933] [2022-12-14 08:38:07,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311835933] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:07,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957074594] [2022-12-14 08:38:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:07,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:07,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:07,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:07,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:38:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:07,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:38:07,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 08:38:07,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 08:38:07,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957074594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:38:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243303850] [2022-12-14 08:38:07,642 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 08:38:07,642 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:38:07,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:38:07,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:38:07,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:48:54,632 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2022-12-14 08:48:55,431 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 86112 conjuctions. This might take some time... [2022-12-14 08:49:04,744 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 768 conjuctions. [2022-12-14 08:49:04,783 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2022-12-14 08:49:05,558 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 86112 conjuctions. This might take some time... [2022-12-14 08:49:15,903 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 768 conjuctions. [2022-12-14 08:49:18,689 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2022-12-14 08:49:19,482 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 86112 conjuctions. This might take some time... [2022-12-14 08:49:29,695 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 768 conjuctions. [2022-12-14 08:50:59,194 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:51:22,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1304020#(and (<= 26 ~z~0) (<= 5 ~e~0) (<= 25 ~y~0) (<= ~a0~0 1) (<= ~a7~0 0) (<= ~c~0 3) (<= ~e~0 5) (<= 6 ~f~0) (<= 0 |#NULL.base|) (<= ~a1~0 1) (<= ~w~0 23) (<= ~u~0 21) (<= 1 ~a1~0) (<= 1 ~a16~0) (<= |ULTIMATE.start_calculate_output_~input#1| 6) (<= ~a10~0 1) (<= 1 |ULTIMATE.start_calculate_output_~input#1|) (<= |ULTIMATE.start_main_~input~0#1| 6) (<= ~a20~0 0) (<= 0 ~a7~0) (<= ~a9~0 1) (<= ~a4~0 1) (<= 0 ~a17~0) (<= 0 ~a23~0) (<= 0 ~a20~0) (<= ~a13~0 1) (= ~a5~0 1) (<= 0 ~a14~0) (<= ~x~0 24) (<= ~b~0 2) (<= ~a2~0 0) (<= 1 ~a22~0) (<= 1 ~a4~0) (<= ~a21~0 1) (<= 3 ~c~0) (<= 1 ~a24~0) (not (= ~a26~0 1)) (<= 1 ~a0~0) (<= ~a28~0 1) (<= |ULTIMATE.start_calculate_output_#in~input#1| 6) (<= 0 ~a12~0) (<= 1 ~a21~0) (<= 0 ~a19~0) (<= |#NULL.offset| 0) (<= ~v~0 22) (<= ~a15~0 1) (<= ~a22~0 1) (<= 1 |ULTIMATE.start_main_~input~0#1|) (<= ~a~0 1) (<= 4 ~d~0) (<= 0 ~a11~0) (<= 23 ~w~0) (<= ~a17~0 0) (<= ~a23~0 0) (<= ~a24~0 1) (<= ~z~0 26) (<= 21 ~u~0) (<= 2 ~b~0) (<= 0 (+ |ULTIMATE.start_main_~output~0#1| 1)) (<= 1 |ULTIMATE.start_calculate_output_#in~input#1|) (= ~a6~0 1) (not (= ~a12~0 1)) (<= 1 ~a9~0) (<= |#NULL.base| 0) (<= ~a8~0 0) (<= ~a14~0 0) (<= 1 ~a29~0) (<= ~y~0 25) (<= 1 ~a13~0) (<= 1 ~a28~0) (<= 1 ~a~0) (= ~a27~0 1) (<= 22 ~v~0) (not (= ~a11~0 1)) (<= 1 ~a10~0) (<= 0 ~a2~0) (<= 1 ~a15~0) (<= 0 |#NULL.offset|) (<= ~d~0 4) (<= 0 |#StackHeapBarrier|) (= ~a3~0 0) (= ~a18~0 1) (<= ~a25~0 0) (<= ~a29~0 1) (<= 0 ~a8~0) (<= ~f~0 6) (<= 0 ~a26~0) (<= ~a16~0 1) (<= 0 ~a25~0) (<= 24 ~x~0) (<= ~a19~0 0))' at error location [2022-12-14 08:51:22,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:51:22,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:51:22,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-14 08:51:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868340816] [2022-12-14 08:51:22,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:51:22,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:51:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:51:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:51:22,189 INFO L87 Difference]: Start difference. First operand 53485 states and 62244 transitions. Second operand has 6 states, 6 states have (on average 63.833333333333336) internal successors, (383), 5 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:24,621 INFO L93 Difference]: Finished difference Result 181333 states and 210844 transitions. [2022-12-14 08:51:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:51:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 63.833333333333336) internal successors, (383), 5 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2022-12-14 08:51:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:24,747 INFO L225 Difference]: With dead ends: 181333 [2022-12-14 08:51:24,747 INFO L226 Difference]: Without dead ends: 128707 [2022-12-14 08:51:24,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 561 SyntacticMatches, 225 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:51:24,789 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 836 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:24,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 206 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2174 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 08:51:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128707 states. [2022-12-14 08:51:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128707 to 120838. [2022-12-14 08:51:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120838 states, 120837 states have (on average 1.1504754338489038) internal successors, (139020), 120837 states have internal predecessors, (139020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120838 states to 120838 states and 139020 transitions. [2022-12-14 08:51:26,183 INFO L78 Accepts]: Start accepts. Automaton has 120838 states and 139020 transitions. Word has length 265 [2022-12-14 08:51:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:26,183 INFO L495 AbstractCegarLoop]: Abstraction has 120838 states and 139020 transitions. [2022-12-14 08:51:26,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.833333333333336) internal successors, (383), 5 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 120838 states and 139020 transitions. [2022-12-14 08:51:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-12-14 08:51:26,209 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:26,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:51:26,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:51:26,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:26,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash -935919929, now seen corresponding path program 1 times [2022-12-14 08:51:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:26,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775667317] [2022-12-14 08:51:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 177 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:51:27,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:27,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775667317] [2022-12-14 08:51:27,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775667317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:51:27,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786215014] [2022-12-14 08:51:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:27,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:27,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:27,042 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:51:27,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:51:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:27,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:51:27,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:51:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:51:27,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:51:27,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786215014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:27,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:51:27,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 08:51:27,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319669495] [2022-12-14 08:51:27,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:27,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:51:27,263 INFO L87 Difference]: Start difference. First operand 120838 states and 139020 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:28,330 INFO L93 Difference]: Finished difference Result 251542 states and 290368 transitions. [2022-12-14 08:51:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2022-12-14 08:51:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:28,464 INFO L225 Difference]: With dead ends: 251542 [2022-12-14 08:51:28,464 INFO L226 Difference]: Without dead ends: 131563 [2022-12-14 08:51:28,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:51:28,519 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 81 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:28,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 207 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:51:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131563 states. [2022-12-14 08:51:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131563 to 125271. [2022-12-14 08:51:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125271 states, 125270 states have (on average 1.137694579707831) internal successors, (142519), 125270 states have internal predecessors, (142519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125271 states to 125271 states and 142519 transitions. [2022-12-14 08:51:30,278 INFO L78 Accepts]: Start accepts. Automaton has 125271 states and 142519 transitions. Word has length 321 [2022-12-14 08:51:30,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:30,279 INFO L495 AbstractCegarLoop]: Abstraction has 125271 states and 142519 transitions. [2022-12-14 08:51:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 125271 states and 142519 transitions. [2022-12-14 08:51:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-12-14 08:51:30,321 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:30,322 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 08:51:30,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 08:51:30,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:30,524 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash 801559826, now seen corresponding path program 1 times [2022-12-14 08:51:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:30,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603626606] [2022-12-14 08:51:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 08:51:30,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603626606] [2022-12-14 08:51:30,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603626606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:30,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:30,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:51:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74378731] [2022-12-14 08:51:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:30,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:30,728 INFO L87 Difference]: Start difference. First operand 125271 states and 142519 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:31,969 INFO L93 Difference]: Finished difference Result 246108 states and 279963 transitions. [2022-12-14 08:51:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:31,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 369 [2022-12-14 08:51:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:32,085 INFO L225 Difference]: With dead ends: 246108 [2022-12-14 08:51:32,085 INFO L226 Difference]: Without dead ends: 120266 [2022-12-14 08:51:32,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:32,118 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 130 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:32,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 198 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:51:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120266 states. [2022-12-14 08:51:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120266 to 112544. [2022-12-14 08:51:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112544 states, 112543 states have (on average 1.1213491732049083) internal successors, (126200), 112543 states have internal predecessors, (126200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112544 states to 112544 states and 126200 transitions. [2022-12-14 08:51:33,437 INFO L78 Accepts]: Start accepts. Automaton has 112544 states and 126200 transitions. Word has length 369 [2022-12-14 08:51:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:33,437 INFO L495 AbstractCegarLoop]: Abstraction has 112544 states and 126200 transitions. [2022-12-14 08:51:33,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 112544 states and 126200 transitions. [2022-12-14 08:51:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-12-14 08:51:33,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:33,471 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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 08:51:33,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 08:51:33,471 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1648318943, now seen corresponding path program 1 times [2022-12-14 08:51:33,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:33,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628930428] [2022-12-14 08:51:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:33,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:51:34,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:34,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628930428] [2022-12-14 08:51:34,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628930428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:34,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:34,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:51:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768026367] [2022-12-14 08:51:34,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:34,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:51:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:51:34,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:51:34,059 INFO L87 Difference]: Start difference. First operand 112544 states and 126200 transitions. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:35,124 INFO L93 Difference]: Finished difference Result 221512 states and 248237 transitions. [2022-12-14 08:51:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:51:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2022-12-14 08:51:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:35,276 INFO L225 Difference]: With dead ends: 221512 [2022-12-14 08:51:35,276 INFO L226 Difference]: Without dead ends: 103964 [2022-12-14 08:51:35,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:51:35,312 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 189 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:35,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 10 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:51:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103964 states. [2022-12-14 08:51:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103964 to 92953. [2022-12-14 08:51:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92953 states, 92952 states have (on average 1.113273517514416) internal successors, (103481), 92952 states have internal predecessors, (103481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92953 states to 92953 states and 103481 transitions. [2022-12-14 08:51:36,555 INFO L78 Accepts]: Start accepts. Automaton has 92953 states and 103481 transitions. Word has length 395 [2022-12-14 08:51:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:36,556 INFO L495 AbstractCegarLoop]: Abstraction has 92953 states and 103481 transitions. [2022-12-14 08:51:36,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 92953 states and 103481 transitions. [2022-12-14 08:51:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-12-14 08:51:36,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:36,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 08:51:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 08:51:36,585 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:36,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1731340598, now seen corresponding path program 1 times [2022-12-14 08:51:36,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:36,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790159227] [2022-12-14 08:51:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-12-14 08:51:37,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:37,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790159227] [2022-12-14 08:51:37,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790159227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:37,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:37,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:51:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057218016] [2022-12-14 08:51:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:37,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:37,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:37,456 INFO L87 Difference]: Start difference. First operand 92953 states and 103481 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:38,141 INFO L93 Difference]: Finished difference Result 184904 states and 205907 transitions. [2022-12-14 08:51:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2022-12-14 08:51:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:38,231 INFO L225 Difference]: With dead ends: 184904 [2022-12-14 08:51:38,231 INFO L226 Difference]: Without dead ends: 92953 [2022-12-14 08:51:38,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:38,276 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:38,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 72 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:51:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92953 states. [2022-12-14 08:51:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92953 to 92953. [2022-12-14 08:51:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92953 states, 92952 states have (on average 1.1132412427919787) internal successors, (103478), 92952 states have internal predecessors, (103478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92953 states to 92953 states and 103478 transitions. [2022-12-14 08:51:39,335 INFO L78 Accepts]: Start accepts. Automaton has 92953 states and 103478 transitions. Word has length 395 [2022-12-14 08:51:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:39,335 INFO L495 AbstractCegarLoop]: Abstraction has 92953 states and 103478 transitions. [2022-12-14 08:51:39,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 92953 states and 103478 transitions. [2022-12-14 08:51:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-12-14 08:51:39,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:39,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:51:39,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 08:51:39,366 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash -398487254, now seen corresponding path program 1 times [2022-12-14 08:51:39,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:39,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751615116] [2022-12-14 08:51:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:39,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 08:51:39,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751615116] [2022-12-14 08:51:39,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751615116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:39,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:39,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:51:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604185044] [2022-12-14 08:51:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:39,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:39,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:39,880 INFO L87 Difference]: Start difference. First operand 92953 states and 103478 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:40,596 INFO L93 Difference]: Finished difference Result 186191 states and 207205 transitions. [2022-12-14 08:51:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:40,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 418 [2022-12-14 08:51:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:40,679 INFO L225 Difference]: With dead ends: 186191 [2022-12-14 08:51:40,679 INFO L226 Difference]: Without dead ends: 94240 [2022-12-14 08:51:40,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:40,717 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:40,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 217 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:51:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94240 states. [2022-12-14 08:51:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94240 to 92953. [2022-12-14 08:51:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92953 states, 92952 states have (on average 1.1116920561149841) internal successors, (103334), 92952 states have internal predecessors, (103334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92953 states to 92953 states and 103334 transitions. [2022-12-14 08:51:41,784 INFO L78 Accepts]: Start accepts. Automaton has 92953 states and 103334 transitions. Word has length 418 [2022-12-14 08:51:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:41,784 INFO L495 AbstractCegarLoop]: Abstraction has 92953 states and 103334 transitions. [2022-12-14 08:51:41,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 92953 states and 103334 transitions. [2022-12-14 08:51:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-12-14 08:51:41,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:41,815 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:51:41,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 08:51:41,816 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:41,816 INFO L85 PathProgramCache]: Analyzing trace with hash 116380598, now seen corresponding path program 1 times [2022-12-14 08:51:41,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:41,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058475421] [2022-12-14 08:51:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 256 proven. 3 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-12-14 08:51:42,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058475421] [2022-12-14 08:51:42,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058475421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:51:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61345599] [2022-12-14 08:51:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:42,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:42,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:51:42,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:51:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:51:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:51:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-12-14 08:51:43,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:51:43,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61345599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:43,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:51:43,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 08:51:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649594373] [2022-12-14 08:51:43,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:43,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:51:43,298 INFO L87 Difference]: Start difference. First operand 92953 states and 103334 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:44,469 INFO L93 Difference]: Finished difference Result 197488 states and 218963 transitions. [2022-12-14 08:51:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 422 [2022-12-14 08:51:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:44,587 INFO L225 Difference]: With dead ends: 197488 [2022-12-14 08:51:44,587 INFO L226 Difference]: Without dead ends: 105537 [2022-12-14 08:51:44,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:51:44,638 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:44,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 200 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:51:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105537 states. [2022-12-14 08:51:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105537 to 97672. [2022-12-14 08:51:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97672 states, 97671 states have (on average 1.110001945306181) internal successors, (108415), 97671 states have internal predecessors, (108415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97672 states to 97672 states and 108415 transitions. [2022-12-14 08:51:46,075 INFO L78 Accepts]: Start accepts. Automaton has 97672 states and 108415 transitions. Word has length 422 [2022-12-14 08:51:46,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:46,075 INFO L495 AbstractCegarLoop]: Abstraction has 97672 states and 108415 transitions. [2022-12-14 08:51:46,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 97672 states and 108415 transitions. [2022-12-14 08:51:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-12-14 08:51:46,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:46,136 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:51:46,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:51:46,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 08:51:46,338 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1202565538, now seen corresponding path program 1 times [2022-12-14 08:51:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902865226] [2022-12-14 08:51:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2022-12-14 08:51:47,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902865226] [2022-12-14 08:51:47,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902865226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:47,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:47,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:51:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385888749] [2022-12-14 08:51:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:47,088 INFO L87 Difference]: Start difference. First operand 97672 states and 108415 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:48,072 INFO L93 Difference]: Finished difference Result 196201 states and 217742 transitions. [2022-12-14 08:51:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 568 [2022-12-14 08:51:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:48,168 INFO L225 Difference]: With dead ends: 196201 [2022-12-14 08:51:48,168 INFO L226 Difference]: Without dead ends: 99531 [2022-12-14 08:51:48,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:48,207 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:48,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 72 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:51:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99531 states. [2022-12-14 08:51:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99531 to 99245. [2022-12-14 08:51:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99245 states, 99244 states have (on average 1.1085204143323526) internal successors, (110014), 99244 states have internal predecessors, (110014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99245 states to 99245 states and 110014 transitions. [2022-12-14 08:51:49,464 INFO L78 Accepts]: Start accepts. Automaton has 99245 states and 110014 transitions. Word has length 568 [2022-12-14 08:51:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:49,464 INFO L495 AbstractCegarLoop]: Abstraction has 99245 states and 110014 transitions. [2022-12-14 08:51:49,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 99245 states and 110014 transitions. [2022-12-14 08:51:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-12-14 08:51:49,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:49,528 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 08:51:49,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 08:51:49,528 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash -942515050, now seen corresponding path program 1 times [2022-12-14 08:51:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:49,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284388604] [2022-12-14 08:51:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 529 proven. 3 refuted. 0 times theorem prover too weak. 1263 trivial. 0 not checked. [2022-12-14 08:51:50,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284388604] [2022-12-14 08:51:50,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284388604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:51:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156072491] [2022-12-14 08:51:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:50,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:50,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:50,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:51:50,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3385fc98-ce2a-4dd5-bb60-321a59b9c7b6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:51:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:51:50,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:51:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 1328 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2022-12-14 08:51:50,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:51:50,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156072491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:50,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:51:50,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 08:51:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901560675] [2022-12-14 08:51:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:50,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:51:50,806 INFO L87 Difference]: Start difference. First operand 99245 states and 110014 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:51:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:51,995 INFO L93 Difference]: Finished difference Result 284434 states and 315118 transitions. [2022-12-14 08:51:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 683 [2022-12-14 08:51:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:52,182 INFO L225 Difference]: With dead ends: 284434 [2022-12-14 08:51:52,182 INFO L226 Difference]: Without dead ends: 186191 [2022-12-14 08:51:52,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:51:52,247 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 115 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:52,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 299 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:51:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186191 states.