./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/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_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/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_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/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 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 --- 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 10:03:11,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:03:11,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:03:11,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:03:11,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:03:11,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:03:11,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:03:11,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:03:11,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:03:11,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:03:11,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:03:11,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:03:11,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:03:11,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:03:11,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:03:11,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:03:11,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:03:11,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:03:11,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:03:11,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:03:11,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:03:11,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:03:11,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:03:11,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:03:11,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:03:11,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:03:11,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:03:11,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:03:11,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:03:11,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:03:11,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:03:11,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:03:11,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:03:11,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:03:11,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:03:11,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:03:11,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:03:11,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:03:11,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:03:11,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:03:11,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:03:11,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:03:11,389 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:03:11,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:03:11,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:03:11,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:03:11,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:03:11,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:03:11,398 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:03:11,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:03:11,398 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:03:11,398 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:03:11,398 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:03:11,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:03:11,399 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:03:11,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:03:11,399 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:03:11,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:03:11,399 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:03:11,399 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:03:11,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:03:11,400 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:03:11,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:03:11,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:03:11,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:03:11,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:03:11,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:03:11,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:03:11,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:03:11,402 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:03:11,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:03:11,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:03:11,402 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:03:11,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:03:11,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:03:11,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:03:11,403 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_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 [2022-12-14 10:03:11,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:03:11,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:03:11,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:03:11,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:03:11,593 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:03:11,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-12-14 10:03:14,161 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:03:14,327 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:03:14,328 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-12-14 10:03:14,335 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/data/99fa48fa9/d4a6a478d2e043d1880084af333203bd/FLAGab7542a22 [2022-12-14 10:03:14,346 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/data/99fa48fa9/d4a6a478d2e043d1880084af333203bd [2022-12-14 10:03:14,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:03:14,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:03:14,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:03:14,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:03:14,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:03:14,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aa24a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14, skipping insertion in model container [2022-12-14 10:03:14,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:03:14,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:03:14,526 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_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2022-12-14 10:03:14,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:03:14,559 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:03:14,592 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_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2022-12-14 10:03:14,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:03:14,620 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:03:14,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14 WrapperNode [2022-12-14 10:03:14,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:03:14,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:03:14,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:03:14,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:03:14,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,658 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 588 [2022-12-14 10:03:14,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:03:14,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:03:14,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:03:14,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:03:14,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:03:14,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:03:14,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:03:14,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:03:14,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (1/1) ... [2022-12-14 10:03:14,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:03:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:14,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:03:14,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:03:14,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:03:14,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:03:14,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:03:14,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:03:14,848 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:03:14,849 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:03:15,239 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:03:15,428 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:03:15,428 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 10:03:15,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:03:15 BoogieIcfgContainer [2022-12-14 10:03:15,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:03:15,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:03:15,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:03:15,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:03:15,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:03:14" (1/3) ... [2022-12-14 10:03:15,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8cb4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:03:15, skipping insertion in model container [2022-12-14 10:03:15,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:03:14" (2/3) ... [2022-12-14 10:03:15,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8cb4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:03:15, skipping insertion in model container [2022-12-14 10:03:15,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:03:15" (3/3) ... [2022-12-14 10:03:15,437 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-12-14 10:03:15,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:03:15,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:03:15,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:03:15,501 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;@5098a8e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:03:15,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:03:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 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 10:03:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 10:03:15,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:15,511 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] [2022-12-14 10:03:15,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1203894572, now seen corresponding path program 1 times [2022-12-14 10:03:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:15,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484088009] [2022-12-14 10:03:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:15,753 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 10:03:15,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484088009] [2022-12-14 10:03:15,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484088009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:15,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:15,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:15,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336069568] [2022-12-14 10:03:15,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:15,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:15,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:15,781 INFO L87 Difference]: Start difference. First operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 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 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 10:03:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:15,852 INFO L93 Difference]: Finished difference Result 209 states and 320 transitions. [2022-12-14 10:03:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:15,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2022-12-14 10:03:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:15,860 INFO L225 Difference]: With dead ends: 209 [2022-12-14 10:03:15,861 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 10:03:15,863 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 10:03:15,865 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 93 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:15,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 325 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 10:03:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-12-14 10:03:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 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 10:03:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2022-12-14 10:03:15,899 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 38 [2022-12-14 10:03:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:15,900 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2022-12-14 10:03:15,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 10:03:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2022-12-14 10:03:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 10:03:15,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:15,901 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] [2022-12-14 10:03:15,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:03:15,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash -193135057, now seen corresponding path program 1 times [2022-12-14 10:03:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:15,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360724758] [2022-12-14 10:03:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:15,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:15,983 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 10:03:15,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:15,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360724758] [2022-12-14 10:03:15,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360724758] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:15,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:15,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443573005] [2022-12-14 10:03:15,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:15,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:15,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:15,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:15,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:15,987 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 10:03:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:16,044 INFO L93 Difference]: Finished difference Result 282 states and 413 transitions. [2022-12-14 10:03:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-12-14 10:03:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:16,046 INFO L225 Difference]: With dead ends: 282 [2022-12-14 10:03:16,046 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 10:03:16,047 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 10:03:16,048 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:16,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 10:03:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-12-14 10:03:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.430939226519337) internal successors, (259), 181 states have internal predecessors, (259), 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 10:03:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 259 transitions. [2022-12-14 10:03:16,062 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 259 transitions. Word has length 40 [2022-12-14 10:03:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:16,062 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 259 transitions. [2022-12-14 10:03:16,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 10:03:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 259 transitions. [2022-12-14 10:03:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 10:03:16,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:16,063 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] [2022-12-14 10:03:16,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:03:16,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1952602460, now seen corresponding path program 1 times [2022-12-14 10:03:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:16,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092704668] [2022-12-14 10:03:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:16,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:16,137 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 10:03:16,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092704668] [2022-12-14 10:03:16,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092704668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:16,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463682277] [2022-12-14 10:03:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:16,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:16,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:16,139 INFO L87 Difference]: Start difference. First operand 182 states and 259 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 10:03:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:16,189 INFO L93 Difference]: Finished difference Result 448 states and 658 transitions. [2022-12-14 10:03:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:16,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-12-14 10:03:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:16,191 INFO L225 Difference]: With dead ends: 448 [2022-12-14 10:03:16,191 INFO L226 Difference]: Without dead ends: 297 [2022-12-14 10:03:16,192 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 10:03:16,193 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 77 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:16,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 233 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-14 10:03:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2022-12-14 10:03:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.4489795918367347) internal successors, (426), 294 states have internal predecessors, (426), 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 10:03:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 426 transitions. [2022-12-14 10:03:16,219 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 426 transitions. Word has length 42 [2022-12-14 10:03:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:16,219 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 426 transitions. [2022-12-14 10:03:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 10:03:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 426 transitions. [2022-12-14 10:03:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:03:16,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:16,220 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] [2022-12-14 10:03:16,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:03:16,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -129986801, now seen corresponding path program 1 times [2022-12-14 10:03:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:16,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321596486] [2022-12-14 10:03:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:16,272 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 10:03:16,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:16,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321596486] [2022-12-14 10:03:16,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321596486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:16,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:16,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758920904] [2022-12-14 10:03:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:16,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:16,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:16,274 INFO L87 Difference]: Start difference. First operand 295 states and 426 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 10:03:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:16,325 INFO L93 Difference]: Finished difference Result 723 states and 1068 transitions. [2022-12-14 10:03:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2022-12-14 10:03:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:16,328 INFO L225 Difference]: With dead ends: 723 [2022-12-14 10:03:16,328 INFO L226 Difference]: Without dead ends: 459 [2022-12-14 10:03:16,329 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 10:03:16,330 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:16,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-12-14 10:03:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2022-12-14 10:03:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.4671052631578947) internal successors, (669), 456 states have internal predecessors, (669), 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 10:03:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 669 transitions. [2022-12-14 10:03:16,354 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 669 transitions. Word has length 44 [2022-12-14 10:03:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:16,355 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 669 transitions. [2022-12-14 10:03:16,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 10:03:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 669 transitions. [2022-12-14 10:03:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 10:03:16,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:16,356 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] [2022-12-14 10:03:16,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:03:16,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:16,357 INFO L85 PathProgramCache]: Analyzing trace with hash 305400130, now seen corresponding path program 1 times [2022-12-14 10:03:16,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:16,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872097938] [2022-12-14 10:03:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:16,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:16,400 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 10:03:16,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872097938] [2022-12-14 10:03:16,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872097938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:16,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:16,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137911894] [2022-12-14 10:03:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:16,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:16,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:16,403 INFO L87 Difference]: Start difference. First operand 457 states and 669 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 10:03:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:16,490 INFO L93 Difference]: Finished difference Result 1175 states and 1736 transitions. [2022-12-14 10:03:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:16,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2022-12-14 10:03:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:16,492 INFO L225 Difference]: With dead ends: 1175 [2022-12-14 10:03:16,492 INFO L226 Difference]: Without dead ends: 762 [2022-12-14 10:03:16,493 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 10:03:16,494 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 72 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:16,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 214 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-12-14 10:03:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2022-12-14 10:03:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.458498023715415) internal successors, (1107), 759 states have internal predecessors, (1107), 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 10:03:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1107 transitions. [2022-12-14 10:03:16,536 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1107 transitions. Word has length 46 [2022-12-14 10:03:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:16,537 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1107 transitions. [2022-12-14 10:03:16,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 10:03:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1107 transitions. [2022-12-14 10:03:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 10:03:16,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:16,538 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] [2022-12-14 10:03:16,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:03:16,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1581532322, now seen corresponding path program 1 times [2022-12-14 10:03:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:16,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152557250] [2022-12-14 10:03:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:16,583 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 10:03:16,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:16,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152557250] [2022-12-14 10:03:16,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152557250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:16,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:16,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:16,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910486026] [2022-12-14 10:03:16,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:16,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:16,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:16,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:16,584 INFO L87 Difference]: Start difference. First operand 760 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 10:03:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:16,671 INFO L93 Difference]: Finished difference Result 1902 states and 2802 transitions. [2022-12-14 10:03:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-12-14 10:03:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:16,674 INFO L225 Difference]: With dead ends: 1902 [2022-12-14 10:03:16,674 INFO L226 Difference]: Without dead ends: 1186 [2022-12-14 10:03:16,675 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 10:03:16,676 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 71 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:16,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 203 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-12-14 10:03:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2022-12-14 10:03:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.466610312764159) internal successors, (1735), 1183 states have internal predecessors, (1735), 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 10:03:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1735 transitions. [2022-12-14 10:03:16,729 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1735 transitions. Word has length 48 [2022-12-14 10:03:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:16,729 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1735 transitions. [2022-12-14 10:03:16,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 10:03:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1735 transitions. [2022-12-14 10:03:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 10:03:16,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:16,730 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] [2022-12-14 10:03:16,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:03:16,730 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:16,731 INFO L85 PathProgramCache]: Analyzing trace with hash -256432369, now seen corresponding path program 1 times [2022-12-14 10:03:16,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:16,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14407106] [2022-12-14 10:03:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:16,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:16,794 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 10:03:16,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14407106] [2022-12-14 10:03:16,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14407106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:16,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:16,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:03:16,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090208095] [2022-12-14 10:03:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:16,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:16,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:03:16,796 INFO L87 Difference]: Start difference. First operand 1184 states and 1735 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 10:03:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:17,067 INFO L93 Difference]: Finished difference Result 3012 states and 4441 transitions. [2022-12-14 10:03:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:03:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2022-12-14 10:03:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:17,073 INFO L225 Difference]: With dead ends: 3012 [2022-12-14 10:03:17,073 INFO L226 Difference]: Without dead ends: 1867 [2022-12-14 10:03:17,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:03:17,075 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 439 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:17,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 811 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:03:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2022-12-14 10:03:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1841. [2022-12-14 10:03:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.4728260869565217) internal successors, (2710), 1840 states have internal predecessors, (2710), 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 10:03:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2710 transitions. [2022-12-14 10:03:17,165 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2710 transitions. Word has length 50 [2022-12-14 10:03:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:17,165 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2710 transitions. [2022-12-14 10:03:17,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 10:03:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2710 transitions. [2022-12-14 10:03:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 10:03:17,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:17,166 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] [2022-12-14 10:03:17,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:03:17,166 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash 578026953, now seen corresponding path program 1 times [2022-12-14 10:03:17,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:17,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690721983] [2022-12-14 10:03:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:17,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:17,216 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 10:03:17,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690721983] [2022-12-14 10:03:17,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690721983] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:17,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:17,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:03:17,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890182888] [2022-12-14 10:03:17,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:17,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:03:17,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:03:17,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:03:17,218 INFO L87 Difference]: Start difference. First operand 1841 states and 2710 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 10:03:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:17,371 INFO L93 Difference]: Finished difference Result 3627 states and 5352 transitions. [2022-12-14 10:03:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:03:17,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-12-14 10:03:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:17,378 INFO L225 Difference]: With dead ends: 3627 [2022-12-14 10:03:17,378 INFO L226 Difference]: Without dead ends: 1843 [2022-12-14 10:03:17,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:03:17,382 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 145 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:17,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 297 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-12-14 10:03:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1838. [2022-12-14 10:03:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.467065868263473) internal successors, (2695), 1837 states have internal predecessors, (2695), 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 10:03:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 2695 transitions. [2022-12-14 10:03:17,530 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 2695 transitions. Word has length 51 [2022-12-14 10:03:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:17,530 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 2695 transitions. [2022-12-14 10:03:17,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 10:03:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 2695 transitions. [2022-12-14 10:03:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:03:17,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:17,531 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] [2022-12-14 10:03:17,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:03:17,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash 416534526, now seen corresponding path program 1 times [2022-12-14 10:03:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:17,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117920960] [2022-12-14 10:03:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:17,729 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 10:03:17,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:17,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117920960] [2022-12-14 10:03:17,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117920960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:17,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:17,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:03:17,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352244928] [2022-12-14 10:03:17,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:17,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:17,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:17,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:17,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:03:17,731 INFO L87 Difference]: Start difference. First operand 1838 states and 2695 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 10:03:17,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:17,932 INFO L93 Difference]: Finished difference Result 3028 states and 4392 transitions. [2022-12-14 10:03:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:03:17,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 59 [2022-12-14 10:03:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:17,939 INFO L225 Difference]: With dead ends: 3028 [2022-12-14 10:03:17,940 INFO L226 Difference]: Without dead ends: 3026 [2022-12-14 10:03:17,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:03:17,941 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 148 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:17,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 576 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:17,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2022-12-14 10:03:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 1882. [2022-12-14 10:03:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.443912812333865) internal successors, (2716), 1881 states have internal predecessors, (2716), 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 10:03:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2716 transitions. [2022-12-14 10:03:18,062 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2716 transitions. Word has length 59 [2022-12-14 10:03:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:18,062 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 2716 transitions. [2022-12-14 10:03:18,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 10:03:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2716 transitions. [2022-12-14 10:03:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 10:03:18,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:18,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:18,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:03:18,063 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 19052562, now seen corresponding path program 1 times [2022-12-14 10:03:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419382975] [2022-12-14 10:03:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:18,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:03:18,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419382975] [2022-12-14 10:03:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419382975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802382078] [2022-12-14 10:03:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:18,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:18,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:18,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:03:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:18,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:03:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:03:19,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:03:19,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802382078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:19,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:03:19,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-12-14 10:03:19,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39926364] [2022-12-14 10:03:19,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:19,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:19,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:03:19,394 INFO L87 Difference]: Start difference. First operand 1882 states and 2716 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 10:03:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:19,884 INFO L93 Difference]: Finished difference Result 5423 states and 7844 transitions. [2022-12-14 10:03:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:03:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 67 [2022-12-14 10:03:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:19,893 INFO L225 Difference]: With dead ends: 5423 [2022-12-14 10:03:19,893 INFO L226 Difference]: Without dead ends: 3583 [2022-12-14 10:03:19,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:03:19,896 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 328 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:19,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 222 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2022-12-14 10:03:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 3581. [2022-12-14 10:03:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.4354748603351954) internal successors, (5139), 3580 states have internal predecessors, (5139), 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 10:03:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5139 transitions. [2022-12-14 10:03:20,243 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5139 transitions. Word has length 67 [2022-12-14 10:03:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:20,243 INFO L495 AbstractCegarLoop]: Abstraction has 3581 states and 5139 transitions. [2022-12-14 10:03:20,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 10:03:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5139 transitions. [2022-12-14 10:03:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 10:03:20,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:20,245 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:03:20,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:03:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 10:03:20,446 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash 544279997, now seen corresponding path program 1 times [2022-12-14 10:03:20,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898339815] [2022-12-14 10:03:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:20,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:03:20,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:20,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898339815] [2022-12-14 10:03:20,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898339815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:20,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:20,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:03:20,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477818203] [2022-12-14 10:03:20,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:20,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:20,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:03:20,555 INFO L87 Difference]: Start difference. First operand 3581 states and 5139 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 10:03:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:21,013 INFO L93 Difference]: Finished difference Result 7126 states and 10239 transitions. [2022-12-14 10:03:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:03:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 70 [2022-12-14 10:03:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:21,020 INFO L225 Difference]: With dead ends: 7126 [2022-12-14 10:03:21,020 INFO L226 Difference]: Without dead ends: 3581 [2022-12-14 10:03:21,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:03:21,023 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 281 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:21,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 99 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2022-12-14 10:03:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3581. [2022-12-14 10:03:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.405586592178771) internal successors, (5032), 3580 states have internal predecessors, (5032), 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 10:03:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5032 transitions. [2022-12-14 10:03:21,486 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5032 transitions. Word has length 70 [2022-12-14 10:03:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:21,486 INFO L495 AbstractCegarLoop]: Abstraction has 3581 states and 5032 transitions. [2022-12-14 10:03:21,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 10:03:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5032 transitions. [2022-12-14 10:03:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 10:03:21,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:21,487 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:03:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:03:21,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash 41235170, now seen corresponding path program 1 times [2022-12-14 10:03:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421351427] [2022-12-14 10:03:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:03:22,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421351427] [2022-12-14 10:03:22,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421351427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185002576] [2022-12-14 10:03:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:22,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:22,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:03:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:03:22,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:03:22,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:03:22,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185002576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:22,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:03:22,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-12-14 10:03:22,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552989237] [2022-12-14 10:03:22,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:22,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:22,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:22,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:03:22,720 INFO L87 Difference]: Start difference. First operand 3581 states and 5032 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 10:03:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:23,729 INFO L93 Difference]: Finished difference Result 10397 states and 14618 transitions. [2022-12-14 10:03:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:03:23,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 70 [2022-12-14 10:03:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:23,742 INFO L225 Difference]: With dead ends: 10397 [2022-12-14 10:03:23,742 INFO L226 Difference]: Without dead ends: 6889 [2022-12-14 10:03:23,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:03:23,745 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 239 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:23,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 283 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6889 states. [2022-12-14 10:03:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6889 to 6887. [2022-12-14 10:03:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6887 states, 6886 states have (on average 1.3976183560848097) internal successors, (9624), 6886 states have internal predecessors, (9624), 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 10:03:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6887 states to 6887 states and 9624 transitions. [2022-12-14 10:03:24,659 INFO L78 Accepts]: Start accepts. Automaton has 6887 states and 9624 transitions. Word has length 70 [2022-12-14 10:03:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:24,659 INFO L495 AbstractCegarLoop]: Abstraction has 6887 states and 9624 transitions. [2022-12-14 10:03:24,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 10:03:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6887 states and 9624 transitions. [2022-12-14 10:03:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:03:24,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:24,661 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:03:24,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:03:24,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:03:24,863 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1695052604, now seen corresponding path program 1 times [2022-12-14 10:03:24,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:24,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730257472] [2022-12-14 10:03:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:03:25,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730257472] [2022-12-14 10:03:25,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730257472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217160597] [2022-12-14 10:03:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:25,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:25,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:25,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:25,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:03:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:03:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:03:25,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:03:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217160597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:25,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:03:25,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-12-14 10:03:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129515489] [2022-12-14 10:03:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:03:25,837 INFO L87 Difference]: Start difference. First operand 6887 states and 9624 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 10:03:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:27,897 INFO L93 Difference]: Finished difference Result 20061 states and 28010 transitions. [2022-12-14 10:03:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:03:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 73 [2022-12-14 10:03:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:27,933 INFO L225 Difference]: With dead ends: 20061 [2022-12-14 10:03:27,933 INFO L226 Difference]: Without dead ends: 13243 [2022-12-14 10:03:27,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:03:27,939 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 347 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:27,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 228 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13243 states. [2022-12-14 10:03:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13243 to 13241. [2022-12-14 10:03:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13241 states, 13240 states have (on average 1.3861027190332327) internal successors, (18352), 13240 states have internal predecessors, (18352), 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 10:03:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13241 states to 13241 states and 18352 transitions. [2022-12-14 10:03:29,941 INFO L78 Accepts]: Start accepts. Automaton has 13241 states and 18352 transitions. Word has length 73 [2022-12-14 10:03:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:29,941 INFO L495 AbstractCegarLoop]: Abstraction has 13241 states and 18352 transitions. [2022-12-14 10:03:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 10:03:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 13241 states and 18352 transitions. [2022-12-14 10:03:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 10:03:29,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:29,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:29,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:03:30,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 10:03:30,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1240245063, now seen corresponding path program 1 times [2022-12-14 10:03:30,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:30,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200344387] [2022-12-14 10:03:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:30,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:03:30,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:30,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200344387] [2022-12-14 10:03:30,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200344387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:30,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:30,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:03:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389632591] [2022-12-14 10:03:30,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:30,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:30,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:03:30,219 INFO L87 Difference]: Start difference. First operand 13241 states and 18352 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 10:03:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:32,492 INFO L93 Difference]: Finished difference Result 26425 states and 36637 transitions. [2022-12-14 10:03:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:03:32,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 76 [2022-12-14 10:03:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:32,512 INFO L225 Difference]: With dead ends: 26425 [2022-12-14 10:03:32,512 INFO L226 Difference]: Without dead ends: 13241 [2022-12-14 10:03:32,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:03:32,521 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 265 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:32,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13241 states. [2022-12-14 10:03:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13241 to 13241. [2022-12-14 10:03:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13241 states, 13240 states have (on average 1.3595166163141994) internal successors, (18000), 13240 states have internal predecessors, (18000), 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 10:03:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13241 states to 13241 states and 18000 transitions. [2022-12-14 10:03:34,753 INFO L78 Accepts]: Start accepts. Automaton has 13241 states and 18000 transitions. Word has length 76 [2022-12-14 10:03:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:34,753 INFO L495 AbstractCegarLoop]: Abstraction has 13241 states and 18000 transitions. [2022-12-14 10:03:34,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 10:03:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 13241 states and 18000 transitions. [2022-12-14 10:03:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 10:03:34,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:34,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:34,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:03:34,754 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:34,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1083297196, now seen corresponding path program 1 times [2022-12-14 10:03:34,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:34,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837499824] [2022-12-14 10:03:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:34,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:03:35,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:35,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837499824] [2022-12-14 10:03:35,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837499824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:35,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883712977] [2022-12-14 10:03:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:35,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:35,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:35,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:03:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:35,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:03:35,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:03:35,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:03:35,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883712977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:35,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:03:35,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2022-12-14 10:03:35,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196102735] [2022-12-14 10:03:35,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:35,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:03:35,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:03:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:03:35,889 INFO L87 Difference]: Start difference. First operand 13241 states and 18000 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 10:03:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:39,184 INFO L93 Difference]: Finished difference Result 25465 states and 34444 transitions. [2022-12-14 10:03:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:03:39,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 76 [2022-12-14 10:03:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:39,205 INFO L225 Difference]: With dead ends: 25465 [2022-12-14 10:03:39,206 INFO L226 Difference]: Without dead ends: 18603 [2022-12-14 10:03:39,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:03:39,214 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 441 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:39,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 278 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18603 states. [2022-12-14 10:03:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18603 to 13263. [2022-12-14 10:03:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13263 states, 13262 states have (on average 1.3592972402352586) internal successors, (18027), 13262 states have internal predecessors, (18027), 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 10:03:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13263 states to 13263 states and 18027 transitions. [2022-12-14 10:03:41,602 INFO L78 Accepts]: Start accepts. Automaton has 13263 states and 18027 transitions. Word has length 76 [2022-12-14 10:03:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:41,602 INFO L495 AbstractCegarLoop]: Abstraction has 13263 states and 18027 transitions. [2022-12-14 10:03:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 10:03:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 13263 states and 18027 transitions. [2022-12-14 10:03:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 10:03:41,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:41,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:41,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:03:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 10:03:41,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1709823482, now seen corresponding path program 1 times [2022-12-14 10:03:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:41,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872360115] [2022-12-14 10:03:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:03:42,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:42,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872360115] [2022-12-14 10:03:42,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872360115] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:42,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470379966] [2022-12-14 10:03:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:42,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:42,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:42,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:42,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:03:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:42,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:03:42,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:03:42,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:03:42,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470379966] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:42,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:03:42,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-12-14 10:03:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095925645] [2022-12-14 10:03:42,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:42,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:03:42,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:42,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:03:42,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:03:42,993 INFO L87 Difference]: Start difference. First operand 13263 states and 18027 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 10:03:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:46,452 INFO L93 Difference]: Finished difference Result 26453 states and 35870 transitions. [2022-12-14 10:03:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:03:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 76 [2022-12-14 10:03:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:46,478 INFO L225 Difference]: With dead ends: 26453 [2022-12-14 10:03:46,478 INFO L226 Difference]: Without dead ends: 19671 [2022-12-14 10:03:46,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:03:46,485 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 239 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:46,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 266 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:03:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19671 states. [2022-12-14 10:03:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19671 to 19669. [2022-12-14 10:03:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19669 states, 19668 states have (on average 1.3455358958714663) internal successors, (26464), 19668 states have internal predecessors, (26464), 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 10:03:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19669 states to 19669 states and 26464 transitions. [2022-12-14 10:03:49,868 INFO L78 Accepts]: Start accepts. Automaton has 19669 states and 26464 transitions. Word has length 76 [2022-12-14 10:03:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:49,868 INFO L495 AbstractCegarLoop]: Abstraction has 19669 states and 26464 transitions. [2022-12-14 10:03:49,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 10:03:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19669 states and 26464 transitions. [2022-12-14 10:03:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 10:03:49,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:49,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:49,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:03:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:03:50,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash -935330900, now seen corresponding path program 1 times [2022-12-14 10:03:50,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:50,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331000057] [2022-12-14 10:03:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:50,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:03:50,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:50,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331000057] [2022-12-14 10:03:50,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331000057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:50,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225241109] [2022-12-14 10:03:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:50,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:50,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:50,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:50,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cccd158-bfeb-4d3b-8c12-f017d2b56b10/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:03:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 10:03:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:03:51,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:55,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225241109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745259026] [2022-12-14 10:03:55,393 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 10:03:55,393 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:03:55,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:03:55,399 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:03:55,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:03:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:03:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:03:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:03:56,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 10:03:56,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:03:56,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:03:56,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 10:03:56,305 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 10:04:02,661 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 10:17:55,824 WARN L233 SmtUtils]: Spent 11.08s on a formula simplification that was a NOOP. DAG size: 513 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)