./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur --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 fe928253903b53f54ebedf490d9fbda0197f21d364e7cf3f1232104480e6242f --- 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-38b53e6 [2022-11-26 00:19:19,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:19:19,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:19:19,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:19:19,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:19:19,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:19:19,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:19:19,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:19:19,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:19:19,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:19:19,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:19:19,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:19:19,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:19:19,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:19:19,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:19:19,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:19:19,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:19:19,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:19:19,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:19:19,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:19:19,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:19:19,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:19:19,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:19:19,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:19:19,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:19:19,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:19:19,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:19:19,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:19:19,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:19:19,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:19:19,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:19:19,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:19:19,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:19:19,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:19:19,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:19:19,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:19:19,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:19:19,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:19:19,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:19:19,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:19:19,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:19:19,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:19:19,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:19:19,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:19:19,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:19:19,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:19:19,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:19:19,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:19:19,712 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:19:19,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:19:19,713 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:19:19,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:19:19,714 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:19:19,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:19:19,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:19:19,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:19:19,715 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:19:19,716 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:19:19,716 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:19:19,716 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:19:19,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:19:19,718 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:19:19,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:19:19,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:19:19,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:19:19,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:19:19,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:19:19,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:19:19,721 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:19:19,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:19:19,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:19:19,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:19:19,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:19:19,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:19:19,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:19:19,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:19:19,723 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:19:19,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:19:19,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:19:19,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:19:19,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:19:19,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:19:19,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:19:19,725 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_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe928253903b53f54ebedf490d9fbda0197f21d364e7cf3f1232104480e6242f [2022-11-26 00:19:20,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:19:20,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:19:20,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:19:20,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:19:20,087 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:19:20,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-26 00:19:23,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:19:23,415 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:19:23,416 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-26 00:19:23,430 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/data/3545dbc28/122d2907d552457782716852222d12da/FLAG17327ebfe [2022-11-26 00:19:23,447 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/data/3545dbc28/122d2907d552457782716852222d12da [2022-11-26 00:19:23,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:19:23,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:19:23,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:19:23,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:19:23,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:19:23,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:19:23" (1/1) ... [2022-11-26 00:19:23,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e14b697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:23, skipping insertion in model container [2022-11-26 00:19:23,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:19:23" (1/1) ... [2022-11-26 00:19:23,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:19:23,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:19:23,854 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_bc2e6db2-d411-420a-b2ea-2145c47bb603/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2022-11-26 00:19:23,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:19:23,996 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:19:24,153 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_bc2e6db2-d411-420a-b2ea-2145c47bb603/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2022-11-26 00:19:24,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:19:24,234 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:19:24,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24 WrapperNode [2022-11-26 00:19:24,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:19:24,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:19:24,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:19:24,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:19:24,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,332 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1292 [2022-11-26 00:19:24,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:19:24,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:19:24,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:19:24,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:19:24,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,390 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:19:24,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:19:24,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:19:24,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:19:24,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (1/1) ... [2022-11-26 00:19:24,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:19:24,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:24,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:19:24,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:19:24,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:19:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:19:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:19:24,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:19:24,782 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:19:24,800 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:19:25,909 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:19:26,261 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:19:26,261 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:19:26,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:19:26 BoogieIcfgContainer [2022-11-26 00:19:26,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:19:26,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:19:26,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:19:26,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:19:26,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:19:23" (1/3) ... [2022-11-26 00:19:26,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64448bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:19:26, skipping insertion in model container [2022-11-26 00:19:26,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:19:24" (2/3) ... [2022-11-26 00:19:26,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64448bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:19:26, skipping insertion in model container [2022-11-26 00:19:26,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:19:26" (3/3) ... [2022-11-26 00:19:26,274 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-26 00:19:26,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:19:26,297 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:19:26,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:19:26,407 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;@5473314, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:19:26,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:19:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 254 states have (on average 1.6811023622047243) internal successors, (427), 255 states have internal predecessors, (427), 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) [2022-11-26 00:19:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 00:19:26,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:26,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:26,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash -931180938, now seen corresponding path program 1 times [2022-11-26 00:19:26,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:26,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979325839] [2022-11-26 00:19:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:26,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:27,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979325839] [2022-11-26 00:19:27,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979325839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:27,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:27,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510846708] [2022-11-26 00:19:27,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:27,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:27,187 INFO L87 Difference]: Start difference. First operand has 256 states, 254 states have (on average 1.6811023622047243) internal successors, (427), 255 states have internal predecessors, (427), 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 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-11-26 00:19:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:27,524 INFO L93 Difference]: Finished difference Result 423 states and 696 transitions. [2022-11-26 00:19:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 102 [2022-11-26 00:19:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:27,553 INFO L225 Difference]: With dead ends: 423 [2022-11-26 00:19:27,554 INFO L226 Difference]: Without dead ends: 327 [2022-11-26 00:19:27,562 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 [2022-11-26 00:19:27,568 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 148 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:27,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 862 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-26 00:19:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2022-11-26 00:19:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.5339506172839505) internal successors, (497), 324 states have internal predecessors, (497), 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) [2022-11-26 00:19:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 497 transitions. [2022-11-26 00:19:27,649 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 497 transitions. Word has length 102 [2022-11-26 00:19:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:27,650 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 497 transitions. [2022-11-26 00:19:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-11-26 00:19:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 497 transitions. [2022-11-26 00:19:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-26 00:19:27,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:27,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:19:27,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash -807122640, now seen corresponding path program 1 times [2022-11-26 00:19:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:27,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238087268] [2022-11-26 00:19:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:27,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:27,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238087268] [2022-11-26 00:19:27,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238087268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:27,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:27,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128085746] [2022-11-26 00:19:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:27,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:27,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:27,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:27,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:27,974 INFO L87 Difference]: Start difference. First operand 325 states and 497 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-11-26 00:19:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:28,169 INFO L93 Difference]: Finished difference Result 577 states and 903 transitions. [2022-11-26 00:19:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:28,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 104 [2022-11-26 00:19:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:28,174 INFO L225 Difference]: With dead ends: 577 [2022-11-26 00:19:28,175 INFO L226 Difference]: Without dead ends: 416 [2022-11-26 00:19:28,176 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 [2022-11-26 00:19:28,178 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 136 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:28,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 657 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-26 00:19:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2022-11-26 00:19:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.5423728813559323) internal successors, (637), 413 states have internal predecessors, (637), 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) [2022-11-26 00:19:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 637 transitions. [2022-11-26 00:19:28,211 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 637 transitions. Word has length 104 [2022-11-26 00:19:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:28,211 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 637 transitions. [2022-11-26 00:19:28,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-11-26 00:19:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 637 transitions. [2022-11-26 00:19:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:19:28,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:28,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:28,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:19:28,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1007750748, now seen corresponding path program 1 times [2022-11-26 00:19:28,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:28,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642835493] [2022-11-26 00:19:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:28,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:28,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:28,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642835493] [2022-11-26 00:19:28,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642835493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:28,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:28,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:28,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123385819] [2022-11-26 00:19:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:28,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:28,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:28,441 INFO L87 Difference]: Start difference. First operand 414 states and 637 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-11-26 00:19:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:28,647 INFO L93 Difference]: Finished difference Result 859 states and 1354 transitions. [2022-11-26 00:19:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:28,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2022-11-26 00:19:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:28,651 INFO L225 Difference]: With dead ends: 859 [2022-11-26 00:19:28,651 INFO L226 Difference]: Without dead ends: 611 [2022-11-26 00:19:28,652 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 [2022-11-26 00:19:28,654 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 136 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:28,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 747 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-26 00:19:28,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 609. [2022-11-26 00:19:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.5641447368421053) internal successors, (951), 608 states have internal predecessors, (951), 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) [2022-11-26 00:19:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 951 transitions. [2022-11-26 00:19:28,701 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 951 transitions. Word has length 107 [2022-11-26 00:19:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:28,702 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 951 transitions. [2022-11-26 00:19:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-11-26 00:19:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 951 transitions. [2022-11-26 00:19:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-26 00:19:28,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:28,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:28,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:19:28,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1771710272, now seen corresponding path program 1 times [2022-11-26 00:19:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:28,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600771953] [2022-11-26 00:19:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:28,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600771953] [2022-11-26 00:19:28,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600771953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:28,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:28,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:28,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653682599] [2022-11-26 00:19:28,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:28,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:28,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:28,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:28,885 INFO L87 Difference]: Start difference. First operand 609 states and 951 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-11-26 00:19:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:29,073 INFO L93 Difference]: Finished difference Result 1318 states and 2090 transitions. [2022-11-26 00:19:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:29,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2022-11-26 00:19:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:29,080 INFO L225 Difference]: With dead ends: 1318 [2022-11-26 00:19:29,080 INFO L226 Difference]: Without dead ends: 875 [2022-11-26 00:19:29,082 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 [2022-11-26 00:19:29,093 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 135 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:29,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 673 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-11-26 00:19:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2022-11-26 00:19:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5745412844036697) internal successors, (1373), 872 states have internal predecessors, (1373), 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) [2022-11-26 00:19:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1373 transitions. [2022-11-26 00:19:29,175 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1373 transitions. Word has length 109 [2022-11-26 00:19:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:29,176 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1373 transitions. [2022-11-26 00:19:29,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-11-26 00:19:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1373 transitions. [2022-11-26 00:19:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-26 00:19:29,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:29,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:19:29,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash -328915782, now seen corresponding path program 1 times [2022-11-26 00:19:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:29,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337714387] [2022-11-26 00:19:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:29,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337714387] [2022-11-26 00:19:29,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337714387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:29,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:29,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698498132] [2022-11-26 00:19:29,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:29,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:29,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:29,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:29,381 INFO L87 Difference]: Start difference. First operand 873 states and 1373 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-11-26 00:19:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:29,631 INFO L93 Difference]: Finished difference Result 2098 states and 3346 transitions. [2022-11-26 00:19:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:29,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2022-11-26 00:19:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:29,639 INFO L225 Difference]: With dead ends: 2098 [2022-11-26 00:19:29,639 INFO L226 Difference]: Without dead ends: 1409 [2022-11-26 00:19:29,640 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 [2022-11-26 00:19:29,645 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 130 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:29,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 720 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-11-26 00:19:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1407. [2022-11-26 00:19:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 1.5846372688477952) internal successors, (2228), 1406 states have internal predecessors, (2228), 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) [2022-11-26 00:19:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2228 transitions. [2022-11-26 00:19:29,853 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2228 transitions. Word has length 112 [2022-11-26 00:19:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:29,854 INFO L495 AbstractCegarLoop]: Abstraction has 1407 states and 2228 transitions. [2022-11-26 00:19:29,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-11-26 00:19:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2228 transitions. [2022-11-26 00:19:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-26 00:19:29,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:29,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:29,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:19:29,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash -659507780, now seen corresponding path program 1 times [2022-11-26 00:19:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:29,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274682153] [2022-11-26 00:19:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:30,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274682153] [2022-11-26 00:19:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274682153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:30,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:30,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:30,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502723117] [2022-11-26 00:19:30,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:30,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:30,080 INFO L87 Difference]: Start difference. First operand 1407 states and 2228 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-11-26 00:19:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:30,478 INFO L93 Difference]: Finished difference Result 3337 states and 5326 transitions. [2022-11-26 00:19:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2022-11-26 00:19:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:30,488 INFO L225 Difference]: With dead ends: 3337 [2022-11-26 00:19:30,488 INFO L226 Difference]: Without dead ends: 2114 [2022-11-26 00:19:30,490 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 [2022-11-26 00:19:30,492 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 129 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:30,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 675 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-11-26 00:19:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2112. [2022-11-26 00:19:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 1.5883467550923733) internal successors, (3353), 2111 states have internal predecessors, (3353), 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) [2022-11-26 00:19:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3353 transitions. [2022-11-26 00:19:30,800 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3353 transitions. Word has length 114 [2022-11-26 00:19:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:30,801 INFO L495 AbstractCegarLoop]: Abstraction has 2112 states and 3353 transitions. [2022-11-26 00:19:30,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-11-26 00:19:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3353 transitions. [2022-11-26 00:19:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-26 00:19:30,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:30,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:19:30,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash -348180324, now seen corresponding path program 1 times [2022-11-26 00:19:30,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:30,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593950364] [2022-11-26 00:19:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:30,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:30,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593950364] [2022-11-26 00:19:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593950364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:30,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:30,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:30,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805858448] [2022-11-26 00:19:30,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:30,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:30,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:30,938 INFO L87 Difference]: Start difference. First operand 2112 states and 3353 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2022-11-26 00:19:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:31,494 INFO L93 Difference]: Finished difference Result 5473 states and 8746 transitions. [2022-11-26 00:19:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 117 [2022-11-26 00:19:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:31,511 INFO L225 Difference]: With dead ends: 5473 [2022-11-26 00:19:31,511 INFO L226 Difference]: Without dead ends: 3563 [2022-11-26 00:19:31,517 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 [2022-11-26 00:19:31,519 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 124 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:31,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 693 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2022-11-26 00:19:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3561. [2022-11-26 00:19:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 1.5890449438202248) internal successors, (5657), 3560 states have internal predecessors, (5657), 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) [2022-11-26 00:19:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 5657 transitions. [2022-11-26 00:19:31,971 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 5657 transitions. Word has length 117 [2022-11-26 00:19:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:31,990 INFO L495 AbstractCegarLoop]: Abstraction has 3561 states and 5657 transitions. [2022-11-26 00:19:31,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2022-11-26 00:19:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 5657 transitions. [2022-11-26 00:19:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-26 00:19:31,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:31,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:31,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:19:31,993 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash -582704553, now seen corresponding path program 1 times [2022-11-26 00:19:31,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:31,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836294631] [2022-11-26 00:19:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:32,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:32,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836294631] [2022-11-26 00:19:32,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836294631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:32,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:32,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:19:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765527993] [2022-11-26 00:19:32,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:32,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:32,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:19:32,126 INFO L87 Difference]: Start difference. First operand 3561 states and 5657 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2022-11-26 00:19:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:32,822 INFO L93 Difference]: Finished difference Result 8848 states and 14110 transitions. [2022-11-26 00:19:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 119 [2022-11-26 00:19:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:32,847 INFO L225 Difference]: With dead ends: 8848 [2022-11-26 00:19:32,847 INFO L226 Difference]: Without dead ends: 5489 [2022-11-26 00:19:32,853 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 [2022-11-26 00:19:32,855 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 123 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:32,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 677 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5489 states. [2022-11-26 00:19:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5489 to 5487. [2022-11-26 00:19:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 1.588953700328108) internal successors, (8717), 5486 states have internal predecessors, (8717), 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) [2022-11-26 00:19:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 8717 transitions. [2022-11-26 00:19:33,467 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 8717 transitions. Word has length 119 [2022-11-26 00:19:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:33,468 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 8717 transitions. [2022-11-26 00:19:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2022-11-26 00:19:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 8717 transitions. [2022-11-26 00:19:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:19:33,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:33,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:33,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:19:33,471 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1787106275, now seen corresponding path program 1 times [2022-11-26 00:19:33,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:33,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384358109] [2022-11-26 00:19:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:33,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:33,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:33,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384358109] [2022-11-26 00:19:33,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384358109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:33,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:33,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:19:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62740421] [2022-11-26 00:19:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:33,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:33,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:33,666 INFO L87 Difference]: Start difference. First operand 5487 states and 8717 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2022-11-26 00:19:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:35,409 INFO L93 Difference]: Finished difference Result 13731 states and 21804 transitions. [2022-11-26 00:19:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:19:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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 122 [2022-11-26 00:19:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:35,449 INFO L225 Difference]: With dead ends: 13731 [2022-11-26 00:19:35,449 INFO L226 Difference]: Without dead ends: 8464 [2022-11-26 00:19:35,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:19:35,460 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1051 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:35,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 3122 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:19:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2022-11-26 00:19:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 8450. [2022-11-26 00:19:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.57758314593443) internal successors, (13329), 8449 states have internal predecessors, (13329), 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) [2022-11-26 00:19:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13329 transitions. [2022-11-26 00:19:36,443 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13329 transitions. Word has length 122 [2022-11-26 00:19:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:36,444 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13329 transitions. [2022-11-26 00:19:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2022-11-26 00:19:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13329 transitions. [2022-11-26 00:19:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 00:19:36,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:36,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:19:36,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash 367218292, now seen corresponding path program 1 times [2022-11-26 00:19:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:36,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041574978] [2022-11-26 00:19:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:36,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:36,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041574978] [2022-11-26 00:19:36,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041574978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:36,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:36,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:36,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810415593] [2022-11-26 00:19:36,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:19:36,593 INFO L87 Difference]: Start difference. First operand 8450 states and 13329 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2022-11-26 00:19:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:37,703 INFO L93 Difference]: Finished difference Result 16682 states and 26340 transitions. [2022-11-26 00:19:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:19:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 123 [2022-11-26 00:19:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:37,734 INFO L225 Difference]: With dead ends: 16682 [2022-11-26 00:19:37,735 INFO L226 Difference]: Without dead ends: 8452 [2022-11-26 00:19:37,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:37,746 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 256 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:37,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1009 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-26 00:19:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-26 00:19:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5735590010652147) internal successors, (13295), 8449 states have internal predecessors, (13295), 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) [2022-11-26 00:19:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13295 transitions. [2022-11-26 00:19:38,932 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13295 transitions. Word has length 123 [2022-11-26 00:19:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:38,933 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13295 transitions. [2022-11-26 00:19:38,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2022-11-26 00:19:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13295 transitions. [2022-11-26 00:19:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 00:19:38,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:38,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:38,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:19:38,936 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1563638844, now seen corresponding path program 1 times [2022-11-26 00:19:38,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017525806] [2022-11-26 00:19:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:39,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:39,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017525806] [2022-11-26 00:19:39,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017525806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:39,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:39,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:39,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182076713] [2022-11-26 00:19:39,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:39,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:39,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:19:39,187 INFO L87 Difference]: Start difference. First operand 8450 states and 13295 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-11-26 00:19:40,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:40,089 INFO L93 Difference]: Finished difference Result 16682 states and 26272 transitions. [2022-11-26 00:19:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:19:40,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 124 [2022-11-26 00:19:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:40,121 INFO L225 Difference]: With dead ends: 16682 [2022-11-26 00:19:40,122 INFO L226 Difference]: Without dead ends: 8452 [2022-11-26 00:19:40,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:40,135 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 264 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:40,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1015 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-26 00:19:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-26 00:19:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5695348561959994) internal successors, (13261), 8449 states have internal predecessors, (13261), 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) [2022-11-26 00:19:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13261 transitions. [2022-11-26 00:19:40,953 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13261 transitions. Word has length 124 [2022-11-26 00:19:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:40,954 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13261 transitions. [2022-11-26 00:19:40,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-11-26 00:19:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13261 transitions. [2022-11-26 00:19:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:19:40,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:40,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:40,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:19:40,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:40,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:40,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1286109893, now seen corresponding path program 1 times [2022-11-26 00:19:40,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:40,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590826162] [2022-11-26 00:19:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:40,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:41,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590826162] [2022-11-26 00:19:41,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590826162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:41,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:41,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:41,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134972780] [2022-11-26 00:19:41,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:41,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:41,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:19:41,090 INFO L87 Difference]: Start difference. First operand 8450 states and 13261 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2022-11-26 00:19:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:42,026 INFO L93 Difference]: Finished difference Result 16682 states and 26204 transitions. [2022-11-26 00:19:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:19:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 125 [2022-11-26 00:19:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:42,051 INFO L225 Difference]: With dead ends: 16682 [2022-11-26 00:19:42,052 INFO L226 Difference]: Without dead ends: 8452 [2022-11-26 00:19:42,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:42,065 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 262 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:42,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1018 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-26 00:19:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-26 00:19:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5655107113267843) internal successors, (13227), 8449 states have internal predecessors, (13227), 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) [2022-11-26 00:19:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13227 transitions. [2022-11-26 00:19:43,185 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13227 transitions. Word has length 125 [2022-11-26 00:19:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:43,186 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13227 transitions. [2022-11-26 00:19:43,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2022-11-26 00:19:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13227 transitions. [2022-11-26 00:19:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-26 00:19:43,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:43,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:19:43,189 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1268088981, now seen corresponding path program 1 times [2022-11-26 00:19:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:43,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329719272] [2022-11-26 00:19:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:43,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:43,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329719272] [2022-11-26 00:19:43,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329719272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:43,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:43,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:19:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294140174] [2022-11-26 00:19:43,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:43,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:43,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:19:43,359 INFO L87 Difference]: Start difference. First operand 8450 states and 13227 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2022-11-26 00:19:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:44,215 INFO L93 Difference]: Finished difference Result 16682 states and 26136 transitions. [2022-11-26 00:19:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:19:44,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 126 [2022-11-26 00:19:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:44,240 INFO L225 Difference]: With dead ends: 16682 [2022-11-26 00:19:44,240 INFO L226 Difference]: Without dead ends: 8452 [2022-11-26 00:19:44,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:19:44,254 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 260 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:44,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1021 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:19:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-26 00:19:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-26 00:19:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.561486566457569) internal successors, (13193), 8449 states have internal predecessors, (13193), 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) [2022-11-26 00:19:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13193 transitions. [2022-11-26 00:19:45,112 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13193 transitions. Word has length 126 [2022-11-26 00:19:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:45,113 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13193 transitions. [2022-11-26 00:19:45,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2022-11-26 00:19:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13193 transitions. [2022-11-26 00:19:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-26 00:19:45,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:45,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:45,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:19:45,115 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:45,116 INFO L85 PathProgramCache]: Analyzing trace with hash -380104196, now seen corresponding path program 1 times [2022-11-26 00:19:45,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:45,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299432110] [2022-11-26 00:19:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:45,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299432110] [2022-11-26 00:19:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299432110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:45,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:19:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538063953] [2022-11-26 00:19:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:45,562 INFO L87 Difference]: Start difference. First operand 8450 states and 13193 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2022-11-26 00:19:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:46,715 INFO L93 Difference]: Finished difference Result 16682 states and 26068 transitions. [2022-11-26 00:19:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:19:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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 128 [2022-11-26 00:19:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:46,732 INFO L225 Difference]: With dead ends: 16682 [2022-11-26 00:19:46,733 INFO L226 Difference]: Without dead ends: 8452 [2022-11-26 00:19:46,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:19:46,747 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 427 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:46,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1321 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-26 00:19:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-26 00:19:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.559592851224997) internal successors, (13177), 8449 states have internal predecessors, (13177), 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) [2022-11-26 00:19:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13177 transitions. [2022-11-26 00:19:47,785 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13177 transitions. Word has length 128 [2022-11-26 00:19:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:47,786 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13177 transitions. [2022-11-26 00:19:47,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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) [2022-11-26 00:19:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13177 transitions. [2022-11-26 00:19:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-26 00:19:47,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:47,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:47,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:19:47,789 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 96287021, now seen corresponding path program 1 times [2022-11-26 00:19:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:47,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958288598] [2022-11-26 00:19:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:47,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:48,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:48,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958288598] [2022-11-26 00:19:48,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958288598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:48,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:48,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:19:48,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488027280] [2022-11-26 00:19:48,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:48,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:48,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:48,117 INFO L87 Difference]: Start difference. First operand 8450 states and 13177 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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) [2022-11-26 00:19:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:49,704 INFO L93 Difference]: Finished difference Result 21010 states and 32666 transitions. [2022-11-26 00:19:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:19:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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 131 [2022-11-26 00:19:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:49,726 INFO L225 Difference]: With dead ends: 21010 [2022-11-26 00:19:49,727 INFO L226 Difference]: Without dead ends: 12780 [2022-11-26 00:19:49,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:19:49,747 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 318 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:49,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1350 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12780 states. [2022-11-26 00:19:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12780 to 12778. [2022-11-26 00:19:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 1.5483290287234874) internal successors, (19783), 12777 states have internal predecessors, (19783), 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) [2022-11-26 00:19:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 19783 transitions. [2022-11-26 00:19:51,555 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 19783 transitions. Word has length 131 [2022-11-26 00:19:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:51,556 INFO L495 AbstractCegarLoop]: Abstraction has 12778 states and 19783 transitions. [2022-11-26 00:19:51,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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) [2022-11-26 00:19:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 19783 transitions. [2022-11-26 00:19:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-26 00:19:51,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:51,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:51,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:19:51,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:51,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1280072598, now seen corresponding path program 1 times [2022-11-26 00:19:51,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:51,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286515448] [2022-11-26 00:19:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:51,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:52,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:52,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286515448] [2022-11-26 00:19:52,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286515448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:52,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:52,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:19:52,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885304122] [2022-11-26 00:19:52,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:52,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:52,215 INFO L87 Difference]: Start difference. First operand 12778 states and 19783 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2022-11-26 00:19:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:54,128 INFO L93 Difference]: Finished difference Result 15663 states and 24171 transitions. [2022-11-26 00:19:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:19:54,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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 132 [2022-11-26 00:19:54,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:54,157 INFO L225 Difference]: With dead ends: 15663 [2022-11-26 00:19:54,157 INFO L226 Difference]: Without dead ends: 15661 [2022-11-26 00:19:54,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:19:54,164 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 372 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:54,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1871 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:19:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15661 states. [2022-11-26 00:19:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15661 to 12792. [2022-11-26 00:19:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12792 states, 12791 states have (on average 1.5461652724571964) internal successors, (19777), 12791 states have internal predecessors, (19777), 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) [2022-11-26 00:19:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12792 states to 12792 states and 19777 transitions. [2022-11-26 00:19:55,549 INFO L78 Accepts]: Start accepts. Automaton has 12792 states and 19777 transitions. Word has length 132 [2022-11-26 00:19:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:55,549 INFO L495 AbstractCegarLoop]: Abstraction has 12792 states and 19777 transitions. [2022-11-26 00:19:55,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2022-11-26 00:19:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states and 19777 transitions. [2022-11-26 00:19:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-26 00:19:55,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:55,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:55,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:19:55,552 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1339109496, now seen corresponding path program 1 times [2022-11-26 00:19:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729285019] [2022-11-26 00:19:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:19:59,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729285019] [2022-11-26 00:19:59,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729285019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491313039] [2022-11-26 00:19:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:59,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:59,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:59,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:19:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:19:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:19:59,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:59,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491313039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:59,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:59,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 16 [2022-11-26 00:19:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839854513] [2022-11-26 00:19:59,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:59,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:19:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:19:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:19:59,882 INFO L87 Difference]: Start difference. First operand 12792 states and 19777 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-11-26 00:20:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:03,001 INFO L93 Difference]: Finished difference Result 37661 states and 58264 transitions. [2022-11-26 00:20:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:20:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 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 141 [2022-11-26 00:20:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:03,165 INFO L225 Difference]: With dead ends: 37661 [2022-11-26 00:20:03,165 INFO L226 Difference]: Without dead ends: 25087 [2022-11-26 00:20:03,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:20:03,178 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 819 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:03,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 747 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:20:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25087 states. [2022-11-26 00:20:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25087 to 25085. [2022-11-26 00:20:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25085 states, 25084 states have (on average 1.5424174772763515) internal successors, (38690), 25084 states have internal predecessors, (38690), 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) [2022-11-26 00:20:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25085 states to 25085 states and 38690 transitions. [2022-11-26 00:20:06,147 INFO L78 Accepts]: Start accepts. Automaton has 25085 states and 38690 transitions. Word has length 141 [2022-11-26 00:20:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:06,147 INFO L495 AbstractCegarLoop]: Abstraction has 25085 states and 38690 transitions. [2022-11-26 00:20:06,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-11-26 00:20:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 25085 states and 38690 transitions. [2022-11-26 00:20:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:20:06,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:06,149 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:06,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:20:06,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc2e6db2-d411-420a-b2ea-2145c47bb603/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:20:06,350 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1095290833, now seen corresponding path program 1 times [2022-11-26 00:20:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:06,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255949514] [2022-11-26 00:20:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:20:06,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:06,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255949514] [2022-11-26 00:20:06,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255949514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:06,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:20:06,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:20:06,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983072919] [2022-11-26 00:20:06,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:20:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:20:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:20:06,522 INFO L87 Difference]: Start difference. First operand 25085 states and 38690 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2022-11-26 00:20:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:12,843 INFO L93 Difference]: Finished difference Result 73633 states and 113624 transitions. [2022-11-26 00:20:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:20:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-26 00:20:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:12,938 INFO L225 Difference]: With dead ends: 73633 [2022-11-26 00:20:12,938 INFO L226 Difference]: Without dead ends: 48636 [2022-11-26 00:20:12,963 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 [2022-11-26 00:20:12,964 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 246 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:12,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 982 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:20:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48636 states. [2022-11-26 00:20:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48636 to 48634. [2022-11-26 00:20:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48634 states, 48633 states have (on average 1.5358707050767997) internal successors, (74694), 48633 states have internal predecessors, (74694), 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) [2022-11-26 00:20:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48634 states to 48634 states and 74694 transitions. [2022-11-26 00:20:18,580 INFO L78 Accepts]: Start accepts. Automaton has 48634 states and 74694 transitions. Word has length 143 [2022-11-26 00:20:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:18,581 INFO L495 AbstractCegarLoop]: Abstraction has 48634 states and 74694 transitions. [2022-11-26 00:20:18,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2022-11-26 00:20:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 48634 states and 74694 transitions. [2022-11-26 00:20:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:20:18,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:18,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:20:18,587 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:18,587 INFO L85 PathProgramCache]: Analyzing trace with hash -536929762, now seen corresponding path program 1 times [2022-11-26 00:20:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:18,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433317067] [2022-11-26 00:20:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:18,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:20:18,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:18,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433317067] [2022-11-26 00:20:18,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433317067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:18,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:20:18,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:20:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856134602] [2022-11-26 00:20:18,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:18,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:20:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:20:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:20:18,704 INFO L87 Difference]: Start difference. First operand 48634 states and 74694 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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)