./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e2c31a6d36722edb2a8cb670626aeeca5f235139fff7eadbabd05db5fa398d5d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:45:04,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:45:04,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:45:04,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:45:04,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:45:04,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:45:04,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:45:04,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:45:04,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:45:04,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:45:04,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:45:04,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:45:04,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:45:04,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:45:04,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:45:04,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:45:04,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:45:04,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:45:04,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:45:04,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:45:04,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:45:04,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:45:04,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:45:04,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:45:04,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:45:04,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:45:04,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:45:04,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:45:04,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:45:04,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:45:04,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:45:04,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:45:04,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:45:04,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:45:04,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:45:04,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:45:04,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:45:04,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:45:04,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:45:04,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:45:04,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:45:04,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:45:04,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:45:04,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:45:04,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:45:04,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:45:04,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:45:04,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:45:04,743 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:45:04,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:45:04,744 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:45:04,744 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:45:04,744 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:45:04,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:45:04,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:45:04,745 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:45:04,745 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:45:04,745 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:45:04,745 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:45:04,745 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:45:04,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:45:04,746 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:45:04,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:45:04,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:45:04,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:45:04,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:45:04,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:45:04,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:45:04,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:45:04,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:45:04,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:45:04,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:45:04,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:45:04,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:45:04,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:45:04,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:45:04,749 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:45:04,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:45:04,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:45:04,750 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:45:04,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:45:04,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:45:04,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:45:04,750 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_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2c31a6d36722edb2a8cb670626aeeca5f235139fff7eadbabd05db5fa398d5d [2022-12-14 14:45:04,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:45:04,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:45:04,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:45:04,971 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:45:04,971 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:45:04,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-12-14 14:45:07,517 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:45:07,740 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:45:07,741 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-12-14 14:45:07,748 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/data/6bc1c7758/4bda5ff1366047dc99074eef2148a284/FLAG075e4236c [2022-12-14 14:45:08,093 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/data/6bc1c7758/4bda5ff1366047dc99074eef2148a284 [2022-12-14 14:45:08,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:45:08,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:45:08,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:45:08,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:45:08,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:45:08,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d62975d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08, skipping insertion in model container [2022-12-14 14:45:08,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:45:08,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:45:08,333 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_16d088f3-56db-4be3-a701-97106a9b0460/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14519,14532] [2022-12-14 14:45:08,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:45:08,404 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:45:08,467 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_16d088f3-56db-4be3-a701-97106a9b0460/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14519,14532] [2022-12-14 14:45:08,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:45:08,515 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:45:08,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08 WrapperNode [2022-12-14 14:45:08,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:45:08,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:45:08,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:45:08,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:45:08,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,577 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1183 [2022-12-14 14:45:08,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:45:08,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:45:08,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:45:08,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:45:08,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,608 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:45:08,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:45:08,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:45:08,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:45:08,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (1/1) ... [2022-12-14 14:45:08,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:45:08,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:08,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:45:08,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d088f3-56db-4be3-a701-97106a9b0460/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:45:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:45:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:45:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:45:08,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:45:08,788 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:45:08,790 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:45:09,488 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:45:09,719 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:45:09,719 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 14:45:09,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:45:09 BoogieIcfgContainer [2022-12-14 14:45:09,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:45:09,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:45:09,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:45:09,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:45:09,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:45:08" (1/3) ... [2022-12-14 14:45:09,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607e6ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:45:09, skipping insertion in model container [2022-12-14 14:45:09,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:08" (2/3) ... [2022-12-14 14:45:09,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607e6ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:45:09, skipping insertion in model container [2022-12-14 14:45:09,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:45:09" (3/3) ... [2022-12-14 14:45:09,727 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-12-14 14:45:09,741 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:45:09,741 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:45:09,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:45:09,783 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;@3be55255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:45:09,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:45:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 234 states, 224 states have (on average 1.7723214285714286) internal successors, (397), 233 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 14:45:09,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:09,797 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] [2022-12-14 14:45:09,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1685287145, now seen corresponding path program 1 times [2022-12-14 14:45:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:09,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634575598] [2022-12-14 14:45:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:10,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:10,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634575598] [2022-12-14 14:45:10,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634575598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:10,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:10,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954335081] [2022-12-14 14:45:10,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:10,723 INFO L87 Difference]: Start difference. First operand has 234 states, 224 states have (on average 1.7723214285714286) internal successors, (397), 233 states have internal predecessors, (397), 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 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:10,913 INFO L93 Difference]: Finished difference Result 595 states and 995 transitions. [2022-12-14 14:45:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:10,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 113 [2022-12-14 14:45:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:10,925 INFO L225 Difference]: With dead ends: 595 [2022-12-14 14:45:10,925 INFO L226 Difference]: Without dead ends: 394 [2022-12-14 14:45:10,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:10,930 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 964 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:10,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 718 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-14 14:45:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2022-12-14 14:45:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.3145780051150895) internal successors, (514), 391 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 514 transitions. [2022-12-14 14:45:10,991 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 514 transitions. Word has length 113 [2022-12-14 14:45:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:10,991 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 514 transitions. [2022-12-14 14:45:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 514 transitions. [2022-12-14 14:45:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 14:45:10,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:10,993 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] [2022-12-14 14:45:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:45:10,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash 104801201, now seen corresponding path program 1 times [2022-12-14 14:45:10,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:10,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688594718] [2022-12-14 14:45:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:10,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:11,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:11,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688594718] [2022-12-14 14:45:11,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688594718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:11,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:11,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:11,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881313108] [2022-12-14 14:45:11,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:11,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:11,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:11,209 INFO L87 Difference]: Start difference. First operand 392 states and 514 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 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) [2022-12-14 14:45:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:11,381 INFO L93 Difference]: Finished difference Result 730 states and 962 transitions. [2022-12-14 14:45:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 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 [2022-12-14 14:45:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:11,383 INFO L225 Difference]: With dead ends: 730 [2022-12-14 14:45:11,383 INFO L226 Difference]: Without dead ends: 392 [2022-12-14 14:45:11,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:11,386 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 794 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:11,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 219 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-12-14 14:45:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-12-14 14:45:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.2915601023017902) internal successors, (505), 391 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 505 transitions. [2022-12-14 14:45:11,419 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 505 transitions. Word has length 119 [2022-12-14 14:45:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:11,419 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 505 transitions. [2022-12-14 14:45:11,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 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) [2022-12-14 14:45:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 505 transitions. [2022-12-14 14:45:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 14:45:11,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:11,421 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] [2022-12-14 14:45:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:45:11,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1445647067, now seen corresponding path program 1 times [2022-12-14 14:45:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:11,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645039443] [2022-12-14 14:45:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:11,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:11,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645039443] [2022-12-14 14:45:11,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645039443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:11,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:11,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:11,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198736490] [2022-12-14 14:45:11,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:11,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:11,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:11,980 INFO L87 Difference]: Start difference. First operand 392 states and 505 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 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) [2022-12-14 14:45:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:12,147 INFO L93 Difference]: Finished difference Result 1025 states and 1325 transitions. [2022-12-14 14:45:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 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 [2022-12-14 14:45:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:12,149 INFO L225 Difference]: With dead ends: 1025 [2022-12-14 14:45:12,149 INFO L226 Difference]: Without dead ends: 723 [2022-12-14 14:45:12,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:12,150 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1077 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:12,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 542 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-12-14 14:45:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 721. [2022-12-14 14:45:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.2875) internal successors, (927), 720 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 927 transitions. [2022-12-14 14:45:12,208 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 927 transitions. Word has length 119 [2022-12-14 14:45:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:12,208 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 927 transitions. [2022-12-14 14:45:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 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) [2022-12-14 14:45:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 927 transitions. [2022-12-14 14:45:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 14:45:12,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:12,210 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] [2022-12-14 14:45:12,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:45:12,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:12,211 INFO L85 PathProgramCache]: Analyzing trace with hash 355125622, now seen corresponding path program 1 times [2022-12-14 14:45:12,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:12,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273663085] [2022-12-14 14:45:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:12,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273663085] [2022-12-14 14:45:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273663085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:12,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:12,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:12,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975166583] [2022-12-14 14:45:12,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:12,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:12,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:12,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:12,309 INFO L87 Difference]: Start difference. First operand 721 states and 927 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 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) [2022-12-14 14:45:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:12,465 INFO L93 Difference]: Finished difference Result 1241 states and 1607 transitions. [2022-12-14 14:45:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 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 [2022-12-14 14:45:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:12,468 INFO L225 Difference]: With dead ends: 1241 [2022-12-14 14:45:12,468 INFO L226 Difference]: Without dead ends: 1015 [2022-12-14 14:45:12,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:12,470 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 200 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:12,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 611 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-12-14 14:45:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 1013. [2022-12-14 14:45:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.2776679841897234) internal successors, (1293), 1012 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1293 transitions. [2022-12-14 14:45:12,556 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1293 transitions. Word has length 125 [2022-12-14 14:45:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:12,557 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1293 transitions. [2022-12-14 14:45:12,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 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) [2022-12-14 14:45:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1293 transitions. [2022-12-14 14:45:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 14:45:12,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:12,559 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] [2022-12-14 14:45:12,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:45:12,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash 508193086, now seen corresponding path program 1 times [2022-12-14 14:45:12,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:12,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721157923] [2022-12-14 14:45:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:12,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:12,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721157923] [2022-12-14 14:45:12,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721157923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:12,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:12,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:45:12,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189042083] [2022-12-14 14:45:12,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:12,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:45:12,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:45:12,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:12,801 INFO L87 Difference]: Start difference. First operand 1013 states and 1293 transitions. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 6 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) [2022-12-14 14:45:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:13,554 INFO L93 Difference]: Finished difference Result 3659 states and 4673 transitions. [2022-12-14 14:45:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:45:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 6 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 [2022-12-14 14:45:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:13,560 INFO L225 Difference]: With dead ends: 3659 [2022-12-14 14:45:13,560 INFO L226 Difference]: Without dead ends: 2693 [2022-12-14 14:45:13,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:45:13,562 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 1930 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1930 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:13,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1930 Valid, 551 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:45:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2022-12-14 14:45:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2689. [2022-12-14 14:45:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 1.240327380952381) internal successors, (3334), 2688 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 3334 transitions. [2022-12-14 14:45:13,783 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 3334 transitions. Word has length 125 [2022-12-14 14:45:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:13,784 INFO L495 AbstractCegarLoop]: Abstraction has 2689 states and 3334 transitions. [2022-12-14 14:45:13,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 6 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) [2022-12-14 14:45:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 3334 transitions. [2022-12-14 14:45:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 14:45:13,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:13,786 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] [2022-12-14 14:45:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:45:13,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash -132446695, now seen corresponding path program 1 times [2022-12-14 14:45:13,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:13,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373938700] [2022-12-14 14:45:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:14,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:14,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373938700] [2022-12-14 14:45:14,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373938700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:14,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:14,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031259097] [2022-12-14 14:45:14,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:14,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:14,180 INFO L87 Difference]: Start difference. First operand 2689 states and 3334 transitions. Second operand has 5 states, 5 states have (on average 25.0) 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) [2022-12-14 14:45:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:14,523 INFO L93 Difference]: Finished difference Result 4315 states and 5450 transitions. [2022-12-14 14:45:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:14,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) 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 [2022-12-14 14:45:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:14,528 INFO L225 Difference]: With dead ends: 4315 [2022-12-14 14:45:14,528 INFO L226 Difference]: Without dead ends: 2739 [2022-12-14 14:45:14,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:14,530 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 569 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:14,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 567 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-12-14 14:45:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2737. [2022-12-14 14:45:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 1.2390350877192982) internal successors, (3390), 2736 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 3390 transitions. [2022-12-14 14:45:14,788 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 3390 transitions. Word has length 125 [2022-12-14 14:45:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:14,789 INFO L495 AbstractCegarLoop]: Abstraction has 2737 states and 3390 transitions. [2022-12-14 14:45:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) 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) [2022-12-14 14:45:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 3390 transitions. [2022-12-14 14:45:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:45:14,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:14,791 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] [2022-12-14 14:45:14,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:45:14,791 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:14,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1684105975, now seen corresponding path program 1 times [2022-12-14 14:45:14,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:14,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28762149] [2022-12-14 14:45:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:14,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:14,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:14,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28762149] [2022-12-14 14:45:14,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28762149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:14,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:14,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742285269] [2022-12-14 14:45:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:14,861 INFO L87 Difference]: Start difference. First operand 2737 states and 3390 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 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) [2022-12-14 14:45:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:15,187 INFO L93 Difference]: Finished difference Result 3287 states and 4102 transitions. [2022-12-14 14:45:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 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 [2022-12-14 14:45:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:15,192 INFO L225 Difference]: With dead ends: 3287 [2022-12-14 14:45:15,192 INFO L226 Difference]: Without dead ends: 2739 [2022-12-14 14:45:15,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:15,194 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 174 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:15,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 549 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-12-14 14:45:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2737. [2022-12-14 14:45:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 1.230263157894737) internal successors, (3366), 2736 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 3366 transitions. [2022-12-14 14:45:15,472 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 3366 transitions. Word has length 131 [2022-12-14 14:45:15,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:15,472 INFO L495 AbstractCegarLoop]: Abstraction has 2737 states and 3366 transitions. [2022-12-14 14:45:15,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 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) [2022-12-14 14:45:15,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 3366 transitions. [2022-12-14 14:45:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:45:15,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:15,475 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] [2022-12-14 14:45:15,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:45:15,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash 664197829, now seen corresponding path program 1 times [2022-12-14 14:45:15,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:15,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531114554] [2022-12-14 14:45:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:15,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:15,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531114554] [2022-12-14 14:45:15,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531114554] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:15,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:15,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041334654] [2022-12-14 14:45:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:15,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:15,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:15,928 INFO L87 Difference]: Start difference. First operand 2737 states and 3366 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:16,337 INFO L93 Difference]: Finished difference Result 3249 states and 4030 transitions. [2022-12-14 14:45:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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 [2022-12-14 14:45:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:16,350 INFO L225 Difference]: With dead ends: 3249 [2022-12-14 14:45:16,351 INFO L226 Difference]: Without dead ends: 2471 [2022-12-14 14:45:16,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:16,352 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 796 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:16,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 610 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-12-14 14:45:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2022-12-14 14:45:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 1.2309562398703404) internal successors, (3038), 2468 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3038 transitions. [2022-12-14 14:45:16,636 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3038 transitions. Word has length 131 [2022-12-14 14:45:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:16,636 INFO L495 AbstractCegarLoop]: Abstraction has 2469 states and 3038 transitions. [2022-12-14 14:45:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3038 transitions. [2022-12-14 14:45:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:45:16,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:16,639 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] [2022-12-14 14:45:16,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:45:16,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2130381498, now seen corresponding path program 1 times [2022-12-14 14:45:16,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:16,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896986826] [2022-12-14 14:45:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:16,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:16,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896986826] [2022-12-14 14:45:16,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896986826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:16,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:16,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:16,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185836109] [2022-12-14 14:45:16,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:16,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:16,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:16,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:16,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:16,734 INFO L87 Difference]: Start difference. First operand 2469 states and 3038 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:17,140 INFO L93 Difference]: Finished difference Result 4775 states and 5863 transitions. [2022-12-14 14:45:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:17,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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 [2022-12-14 14:45:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:17,153 INFO L225 Difference]: With dead ends: 4775 [2022-12-14 14:45:17,153 INFO L226 Difference]: Without dead ends: 2469 [2022-12-14 14:45:17,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:17,157 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 746 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:17,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 221 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-12-14 14:45:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2469. [2022-12-14 14:45:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 1.2034035656401945) internal successors, (2970), 2468 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 2970 transitions. [2022-12-14 14:45:17,410 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 2970 transitions. Word has length 131 [2022-12-14 14:45:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:17,410 INFO L495 AbstractCegarLoop]: Abstraction has 2469 states and 2970 transitions. [2022-12-14 14:45:17,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 2970 transitions. [2022-12-14 14:45:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:45:17,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:17,413 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] [2022-12-14 14:45:17,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:45:17,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:17,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash 529656171, now seen corresponding path program 1 times [2022-12-14 14:45:17,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:17,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458013055] [2022-12-14 14:45:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:33,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:33,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458013055] [2022-12-14 14:45:33,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458013055] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:33,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:33,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-12-14 14:45:33,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334067219] [2022-12-14 14:45:33,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:33,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 14:45:33,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 14:45:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 14:45:33,853 INFO L87 Difference]: Start difference. First operand 2469 states and 2970 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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) [2022-12-14 14:45:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:51,843 INFO L93 Difference]: Finished difference Result 4789 states and 5918 transitions. [2022-12-14 14:45:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 14:45:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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 [2022-12-14 14:45:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:51,850 INFO L225 Difference]: With dead ends: 4789 [2022-12-14 14:45:51,850 INFO L226 Difference]: Without dead ends: 3933 [2022-12-14 14:45:51,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=1282, Invalid=5360, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 14:45:51,852 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 2470 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2470 SdHoareTripleChecker+Valid, 3940 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:51,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2470 Valid, 3940 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 14:45:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2022-12-14 14:45:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3206. [2022-12-14 14:45:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 1.2277691107644306) internal successors, (3935), 3205 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 3935 transitions. [2022-12-14 14:45:52,415 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 3935 transitions. Word has length 131 [2022-12-14 14:45:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:52,415 INFO L495 AbstractCegarLoop]: Abstraction has 3206 states and 3935 transitions. [2022-12-14 14:45:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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) [2022-12-14 14:45:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 3935 transitions. [2022-12-14 14:45:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:45:52,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:52,417 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] [2022-12-14 14:45:52,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:45:52,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash 285605689, now seen corresponding path program 1 times [2022-12-14 14:45:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:52,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129451710] [2022-12-14 14:45:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:52,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:52,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129451710] [2022-12-14 14:45:52,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129451710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:52,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:52,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:52,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813525726] [2022-12-14 14:45:52,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:52,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:52,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:52,790 INFO L87 Difference]: Start difference. First operand 3206 states and 3935 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:53,425 INFO L93 Difference]: Finished difference Result 4090 states and 5088 transitions. [2022-12-14 14:45:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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 [2022-12-14 14:45:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:53,433 INFO L225 Difference]: With dead ends: 4090 [2022-12-14 14:45:53,433 INFO L226 Difference]: Without dead ends: 3143 [2022-12-14 14:45:53,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:53,435 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 643 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:53,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 485 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2022-12-14 14:45:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 2674. [2022-12-14 14:45:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 1.2255892255892256) internal successors, (3276), 2673 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3276 transitions. [2022-12-14 14:45:53,955 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3276 transitions. Word has length 131 [2022-12-14 14:45:53,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:53,956 INFO L495 AbstractCegarLoop]: Abstraction has 2674 states and 3276 transitions. [2022-12-14 14:45:53,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3276 transitions. [2022-12-14 14:45:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:45:53,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:53,957 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] [2022-12-14 14:45:53,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:45:53,958 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:53,958 INFO L85 PathProgramCache]: Analyzing trace with hash -385645787, now seen corresponding path program 1 times [2022-12-14 14:45:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:53,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503549152] [2022-12-14 14:45:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:54,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503549152] [2022-12-14 14:45:54,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503549152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:54,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:54,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317061402] [2022-12-14 14:45:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:45:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:45:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:54,289 INFO L87 Difference]: Start difference. First operand 2674 states and 3276 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:55,074 INFO L93 Difference]: Finished difference Result 4930 states and 6071 transitions. [2022-12-14 14:45:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:45:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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 [2022-12-14 14:45:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:55,081 INFO L225 Difference]: With dead ends: 4930 [2022-12-14 14:45:55,081 INFO L226 Difference]: Without dead ends: 3587 [2022-12-14 14:45:55,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:55,082 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 890 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:55,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 596 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2022-12-14 14:45:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 3585. [2022-12-14 14:45:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3584 states have (on average 1.2134486607142858) internal successors, (4349), 3584 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:45:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 4349 transitions. [2022-12-14 14:45:55,776 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 4349 transitions. Word has length 131 [2022-12-14 14:45:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:55,776 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 4349 transitions. [2022-12-14 14:45:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 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) [2022-12-14 14:45:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 4349 transitions. [2022-12-14 14:45:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:45:55,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:55,778 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] [2022-12-14 14:45:55,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 14:45:55,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1081127345, now seen corresponding path program 1 times [2022-12-14 14:45:55,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:55,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931292192] [2022-12-14 14:45:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:55,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:46:16,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931292192] [2022-12-14 14:46:16,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931292192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:16,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:16,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-12-14 14:46:16,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114359516] [2022-12-14 14:46:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 14:46:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 14:46:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 14:46:16,098 INFO L87 Difference]: Start difference. First operand 3585 states and 4349 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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) [2022-12-14 14:46:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:36,823 INFO L93 Difference]: Finished difference Result 5027 states and 6131 transitions. [2022-12-14 14:46:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 14:46:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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 [2022-12-14 14:46:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:36,830 INFO L225 Difference]: With dead ends: 5027 [2022-12-14 14:46:36,830 INFO L226 Difference]: Without dead ends: 3998 [2022-12-14 14:46:36,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1319, Invalid=5487, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 14:46:36,833 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 2187 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 3713 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 5056 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:36,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2187 Valid, 5056 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3713 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-12-14 14:46:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2022-12-14 14:46:37,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 3727. [2022-12-14 14:46:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 1.2088030059044552) internal successors, (4504), 3726 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:46:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 4504 transitions. [2022-12-14 14:46:37,625 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 4504 transitions. Word has length 131 [2022-12-14 14:46:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:37,626 INFO L495 AbstractCegarLoop]: Abstraction has 3727 states and 4504 transitions. [2022-12-14 14:46:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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) [2022-12-14 14:46:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 4504 transitions. [2022-12-14 14:46:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 14:46:37,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:37,628 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] [2022-12-14 14:46:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 14:46:37,628 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 98815291, now seen corresponding path program 1 times [2022-12-14 14:46:37,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845544211] [2022-12-14 14:46:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:46:37,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:37,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845544211] [2022-12-14 14:46:37,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845544211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:37,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:37,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:46:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594132285] [2022-12-14 14:46:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:37,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:37,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:37,666 INFO L87 Difference]: Start difference. First operand 3727 states and 4504 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:38,813 INFO L93 Difference]: Finished difference Result 6812 states and 8330 transitions. [2022-12-14 14:46:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:38,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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 [2022-12-14 14:46:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:38,819 INFO L225 Difference]: With dead ends: 6812 [2022-12-14 14:46:38,819 INFO L226 Difference]: Without dead ends: 4274 [2022-12-14 14:46:38,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:38,821 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 221 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:38,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 354 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2022-12-14 14:46:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3666. [2022-12-14 14:46:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 3665 states have (on average 1.1994542974079128) internal successors, (4396), 3665 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:46:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 4396 transitions. [2022-12-14 14:46:39,666 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 4396 transitions. Word has length 132 [2022-12-14 14:46:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:39,666 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 4396 transitions. [2022-12-14 14:46:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 4396 transitions. [2022-12-14 14:46:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 14:46:39,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:39,668 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] [2022-12-14 14:46:39,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 14:46:39,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:39,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:39,668 INFO L85 PathProgramCache]: Analyzing trace with hash -299947509, now seen corresponding path program 1 times [2022-12-14 14:46:39,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:39,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011661259] [2022-12-14 14:46:39,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:39,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:46:39,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011661259] [2022-12-14 14:46:39,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011661259] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:39,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:39,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:46:39,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637288850] [2022-12-14 14:46:39,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:39,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:39,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:39,715 INFO L87 Difference]: Start difference. First operand 3666 states and 4396 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:40,617 INFO L93 Difference]: Finished difference Result 6078 states and 7296 transitions. [2022-12-14 14:46:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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 [2022-12-14 14:46:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:40,622 INFO L225 Difference]: With dead ends: 6078 [2022-12-14 14:46:40,622 INFO L226 Difference]: Without dead ends: 3670 [2022-12-14 14:46:40,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:40,624 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 201 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:40,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 239 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-12-14 14:46:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3618. [2022-12-14 14:46:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 1.1882775781034005) internal successors, (4298), 3617 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:46:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 4298 transitions. [2022-12-14 14:46:41,548 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 4298 transitions. Word has length 132 [2022-12-14 14:46:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:41,548 INFO L495 AbstractCegarLoop]: Abstraction has 3618 states and 4298 transitions. [2022-12-14 14:46:41,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 4298 transitions. [2022-12-14 14:46:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 14:46:41,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:41,549 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] [2022-12-14 14:46:41,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 14:46:41,550 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:41,550 INFO L85 PathProgramCache]: Analyzing trace with hash -953742423, now seen corresponding path program 1 times [2022-12-14 14:46:41,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:41,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504930534] [2022-12-14 14:46:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:41,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:46:41,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504930534] [2022-12-14 14:46:41,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504930534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:41,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:46:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693644720] [2022-12-14 14:46:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:41,594 INFO L87 Difference]: Start difference. First operand 3618 states and 4298 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:42,530 INFO L93 Difference]: Finished difference Result 6204 states and 7423 transitions. [2022-12-14 14:46:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:42,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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 [2022-12-14 14:46:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:42,534 INFO L225 Difference]: With dead ends: 6204 [2022-12-14 14:46:42,534 INFO L226 Difference]: Without dead ends: 3793 [2022-12-14 14:46:42,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:42,537 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 194 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:42,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 271 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2022-12-14 14:46:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3479. [2022-12-14 14:46:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.1814261069580219) internal successors, (4109), 3478 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:46:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 4109 transitions. [2022-12-14 14:46:43,282 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 4109 transitions. Word has length 132 [2022-12-14 14:46:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:43,282 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 4109 transitions. [2022-12-14 14:46:43,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 4109 transitions. [2022-12-14 14:46:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 14:46:43,284 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:43,284 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] [2022-12-14 14:46:43,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 14:46:43,284 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash -279171854, now seen corresponding path program 1 times [2022-12-14 14:46:43,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:43,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711453651] [2022-12-14 14:46:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:43,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:46:43,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711453651] [2022-12-14 14:46:43,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711453651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:43,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:43,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:46:43,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67126522] [2022-12-14 14:46:43,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:43,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:43,323 INFO L87 Difference]: Start difference. First operand 3479 states and 4109 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:44,416 INFO L93 Difference]: Finished difference Result 6175 states and 7359 transitions. [2022-12-14 14:46:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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 [2022-12-14 14:46:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:44,421 INFO L225 Difference]: With dead ends: 6175 [2022-12-14 14:46:44,421 INFO L226 Difference]: Without dead ends: 3744 [2022-12-14 14:46:44,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:44,423 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 195 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:44,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 275 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2022-12-14 14:46:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 3434. [2022-12-14 14:46:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 1.1701136032624526) internal successors, (4017), 3433 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:46:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 4017 transitions. [2022-12-14 14:46:45,154 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 4017 transitions. Word has length 132 [2022-12-14 14:46:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:45,154 INFO L495 AbstractCegarLoop]: Abstraction has 3434 states and 4017 transitions. [2022-12-14 14:46:45,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 4017 transitions. [2022-12-14 14:46:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 14:46:45,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:45,157 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] [2022-12-14 14:46:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 14:46:45,158 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:45,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1884146602, now seen corresponding path program 1 times [2022-12-14 14:46:45,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:45,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077409207] [2022-12-14 14:46:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:45,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:46:45,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077409207] [2022-12-14 14:46:45,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077409207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:45,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:45,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:46:45,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233031347] [2022-12-14 14:46:45,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:45,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:45,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:45,202 INFO L87 Difference]: Start difference. First operand 3434 states and 4017 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:46,393 INFO L93 Difference]: Finished difference Result 6344 states and 7497 transitions. [2022-12-14 14:46:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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 [2022-12-14 14:46:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:46,398 INFO L225 Difference]: With dead ends: 6344 [2022-12-14 14:46:46,398 INFO L226 Difference]: Without dead ends: 3915 [2022-12-14 14:46:46,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:46,400 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 188 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:46,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 293 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2022-12-14 14:46:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3361. [2022-12-14 14:46:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.1595238095238096) internal successors, (3896), 3360 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:46:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 3896 transitions. [2022-12-14 14:46:47,118 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 3896 transitions. Word has length 132 [2022-12-14 14:46:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:47,118 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 3896 transitions. [2022-12-14 14:46:47,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 3896 transitions. [2022-12-14 14:46:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 14:46:47,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:47,120 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] [2022-12-14 14:46:47,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 14:46:47,121 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1520724362, now seen corresponding path program 1 times [2022-12-14 14:46:47,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583094196] [2022-12-14 14:46:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:47,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:46:47,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583094196] [2022-12-14 14:46:47,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583094196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:47,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:47,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:46:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979572233] [2022-12-14 14:46:47,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:47,166 INFO L87 Difference]: Start difference. First operand 3361 states and 3896 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:48,036 INFO L93 Difference]: Finished difference Result 5553 states and 6457 transitions. [2022-12-14 14:46:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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 [2022-12-14 14:46:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:48,040 INFO L225 Difference]: With dead ends: 5553 [2022-12-14 14:46:48,040 INFO L226 Difference]: Without dead ends: 3270 [2022-12-14 14:46:48,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:46:48,041 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 168 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:48,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 213 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2022-12-14 14:46:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 3218. [2022-12-14 14:46:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 1.1492073360273547) internal successors, (3697), 3217 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:46:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 3697 transitions. [2022-12-14 14:46:48,714 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 3697 transitions. Word has length 132 [2022-12-14 14:46:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:48,714 INFO L495 AbstractCegarLoop]: Abstraction has 3218 states and 3697 transitions. [2022-12-14 14:46:48,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 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) [2022-12-14 14:46:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 3697 transitions. [2022-12-14 14:46:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:46:48,715 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:48,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:48,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 14:46:48,716 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:48,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1707228649, now seen corresponding path program 1 times [2022-12-14 14:46:48,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:48,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294380342] [2022-12-14 14:46:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:47:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:47:05,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:47:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294380342] [2022-12-14 14:47:05,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294380342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:47:05,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:47:05,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 14:47:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064230619] [2022-12-14 14:47:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:47:05,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 14:47:05,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:47:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 14:47:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 14:47:05,588 INFO L87 Difference]: Start difference. First operand 3218 states and 3697 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:47:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:47:24,295 INFO L93 Difference]: Finished difference Result 3785 states and 4357 transitions. [2022-12-14 14:47:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 14:47:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 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 137 [2022-12-14 14:47:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:47:24,299 INFO L225 Difference]: With dead ends: 3785 [2022-12-14 14:47:24,299 INFO L226 Difference]: Without dead ends: 3333 [2022-12-14 14:47:24,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1323, Invalid=4997, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 14:47:24,301 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 1472 mSDsluCounter, 3861 mSDsCounter, 0 mSdLazyCounter, 4309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 4138 SdHoareTripleChecker+Invalid, 4320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:47:24,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 4138 Invalid, 4320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4309 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-14 14:47:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2022-12-14 14:47:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3217. [2022-12-14 14:47:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 1.148320895522388) internal successors, (3693), 3216 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:47:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 3693 transitions. [2022-12-14 14:47:25,002 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 3693 transitions. Word has length 137 [2022-12-14 14:47:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:47:25,002 INFO L495 AbstractCegarLoop]: Abstraction has 3217 states and 3693 transitions. [2022-12-14 14:47:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:47:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 3693 transitions. [2022-12-14 14:47:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:47:25,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:47:25,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:47:25,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 14:47:25,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:47:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:47:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 726527703, now seen corresponding path program 1 times [2022-12-14 14:47:25,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:47:25,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135739828] [2022-12-14 14:47:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:47:25,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:47:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:47:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:47:47,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:47:47,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135739828] [2022-12-14 14:47:47,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135739828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:47:47,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:47:47,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 14:47:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131137009] [2022-12-14 14:47:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:47:47,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 14:47:47,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:47:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 14:47:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 14:47:47,021 INFO L87 Difference]: Start difference. First operand 3217 states and 3693 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:48:11,788 INFO L93 Difference]: Finished difference Result 3941 states and 4556 transitions. [2022-12-14 14:48:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 14:48:11,790 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2022-12-14 14:48:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:48:11,792 INFO L225 Difference]: With dead ends: 3941 [2022-12-14 14:48:11,793 INFO L226 Difference]: Without dead ends: 3481 [2022-12-14 14:48:11,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1200, Invalid=5606, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 14:48:11,795 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1283 mSDsluCounter, 5465 mSDsCounter, 0 mSdLazyCounter, 6020 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 5782 SdHoareTripleChecker+Invalid, 6031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 6020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:48:11,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 5782 Invalid, 6031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 6020 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-12-14 14:48:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2022-12-14 14:48:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 3216. [2022-12-14 14:48:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 1.147433903576983) internal successors, (3689), 3215 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 3689 transitions. [2022-12-14 14:48:12,528 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 3689 transitions. Word has length 137 [2022-12-14 14:48:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:48:12,529 INFO L495 AbstractCegarLoop]: Abstraction has 3216 states and 3689 transitions. [2022-12-14 14:48:12,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 3689 transitions. [2022-12-14 14:48:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:48:12,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:48:12,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:48:12,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 14:48:12,530 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:48:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:48:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1857551850, now seen corresponding path program 1 times [2022-12-14 14:48:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:48:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54505637] [2022-12-14 14:48:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:48:12,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:48:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:48:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:48:20,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:48:20,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54505637] [2022-12-14 14:48:20,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54505637] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:48:20,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:48:20,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-12-14 14:48:20,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911697861] [2022-12-14 14:48:20,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:48:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 14:48:20,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:48:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 14:48:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 14:48:20,647 INFO L87 Difference]: Start difference. First operand 3216 states and 3689 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:48:32,015 INFO L93 Difference]: Finished difference Result 5982 states and 7219 transitions. [2022-12-14 14:48:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 14:48:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 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 137 [2022-12-14 14:48:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:48:32,019 INFO L225 Difference]: With dead ends: 5982 [2022-12-14 14:48:32,019 INFO L226 Difference]: Without dead ends: 4553 [2022-12-14 14:48:32,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=860, Invalid=4992, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 14:48:32,021 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1027 mSDsluCounter, 3627 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 3900 SdHoareTripleChecker+Invalid, 3502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:48:32,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 3900 Invalid, 3502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 14:48:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2022-12-14 14:48:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 4529. [2022-12-14 14:48:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 1.1826413427561837) internal successors, (5355), 4528 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 5355 transitions. [2022-12-14 14:48:33,107 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 5355 transitions. Word has length 137 [2022-12-14 14:48:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:48:33,107 INFO L495 AbstractCegarLoop]: Abstraction has 4529 states and 5355 transitions. [2022-12-14 14:48:33,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:48:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 5355 transitions. [2022-12-14 14:48:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:48:33,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:48:33,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:48:33,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 14:48:33,109 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:48:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:48:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1685909721, now seen corresponding path program 1 times [2022-12-14 14:48:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:48:33,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739778830] [2022-12-14 14:48:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:48:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:48:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:49:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:49:00,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:49:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739778830] [2022-12-14 14:49:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739778830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:49:00,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:49:00,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 14:49:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616029680] [2022-12-14 14:49:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:49:00,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 14:49:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:49:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 14:49:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 14:49:00,382 INFO L87 Difference]: Start difference. First operand 4529 states and 5355 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:49:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:49:32,463 INFO L93 Difference]: Finished difference Result 5088 states and 6029 transitions. [2022-12-14 14:49:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 14:49:32,464 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2022-12-14 14:49:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:49:32,467 INFO L225 Difference]: With dead ends: 5088 [2022-12-14 14:49:32,467 INFO L226 Difference]: Without dead ends: 4746 [2022-12-14 14:49:32,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1353, Invalid=6303, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 14:49:32,469 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1907 mSDsluCounter, 5489 mSDsCounter, 0 mSdLazyCounter, 5706 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 5812 SdHoareTripleChecker+Invalid, 5718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:49:32,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1907 Valid, 5812 Invalid, 5718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5706 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-12-14 14:49:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2022-12-14 14:49:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 4528. [2022-12-14 14:49:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 1.1822398939695162) internal successors, (5352), 4527 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:49:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 5352 transitions. [2022-12-14 14:49:33,638 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 5352 transitions. Word has length 137 [2022-12-14 14:49:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:49:33,639 INFO L495 AbstractCegarLoop]: Abstraction has 4528 states and 5352 transitions. [2022-12-14 14:49:33,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:49:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 5352 transitions. [2022-12-14 14:49:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:49:33,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:49:33,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:49:33,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 14:49:33,640 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:49:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:49:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash -536784043, now seen corresponding path program 1 times [2022-12-14 14:49:33,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:49:33,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144447740] [2022-12-14 14:49:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:49:33,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:49:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:49:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:49:54,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:49:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144447740] [2022-12-14 14:49:54,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144447740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:49:54,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:49:54,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 14:49:54,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409533691] [2022-12-14 14:49:54,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:49:54,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 14:49:54,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:49:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 14:49:54,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 14:49:54,569 INFO L87 Difference]: Start difference. First operand 4528 states and 5352 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:19,645 INFO L93 Difference]: Finished difference Result 5676 states and 6752 transitions. [2022-12-14 14:50:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 14:50:19,646 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 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 137 [2022-12-14 14:50:19,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:19,649 INFO L225 Difference]: With dead ends: 5676 [2022-12-14 14:50:19,649 INFO L226 Difference]: Without dead ends: 4972 [2022-12-14 14:50:19,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1234, Invalid=5738, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 14:50:19,651 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1651 mSDsluCounter, 4459 mSDsCounter, 0 mSdLazyCounter, 4708 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 4804 SdHoareTripleChecker+Invalid, 4717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:19,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 4804 Invalid, 4717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4708 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-12-14 14:50:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2022-12-14 14:50:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4527. [2022-12-14 14:50:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4527 states, 4526 states have (on average 1.1816173221387538) internal successors, (5348), 4526 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4527 states to 4527 states and 5348 transitions. [2022-12-14 14:50:20,787 INFO L78 Accepts]: Start accepts. Automaton has 4527 states and 5348 transitions. Word has length 137 [2022-12-14 14:50:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:20,787 INFO L495 AbstractCegarLoop]: Abstraction has 4527 states and 5348 transitions. [2022-12-14 14:50:20,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:50:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4527 states and 5348 transitions. [2022-12-14 14:50:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:50:20,790 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:20,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:20,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 14:50:20,790 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1896972309, now seen corresponding path program 1 times [2022-12-14 14:50:20,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:20,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944209563] [2022-12-14 14:50:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:50:38,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:38,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944209563] [2022-12-14 14:50:38,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944209563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:50:38,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:50:38,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 14:50:38,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314959198] [2022-12-14 14:50:38,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:50:38,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 14:50:38,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:50:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 14:50:38,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 14:50:38,916 INFO L87 Difference]: Start difference. First operand 4527 states and 5348 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:02,761 INFO L93 Difference]: Finished difference Result 5610 states and 6686 transitions. [2022-12-14 14:51:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 14:51:02,762 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2022-12-14 14:51:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:02,765 INFO L225 Difference]: With dead ends: 5610 [2022-12-14 14:51:02,765 INFO L226 Difference]: Without dead ends: 4898 [2022-12-14 14:51:02,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1350, Invalid=6306, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 14:51:02,767 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1645 mSDsluCounter, 4770 mSDsCounter, 0 mSdLazyCounter, 5039 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 5111 SdHoareTripleChecker+Invalid, 5053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:02,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1645 Valid, 5111 Invalid, 5053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5039 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-12-14 14:51:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2022-12-14 14:51:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4886. [2022-12-14 14:51:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4886 states, 4885 states have (on average 1.186489252814739) internal successors, (5796), 4885 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4886 states to 4886 states and 5796 transitions. [2022-12-14 14:51:04,041 INFO L78 Accepts]: Start accepts. Automaton has 4886 states and 5796 transitions. Word has length 137 [2022-12-14 14:51:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:04,042 INFO L495 AbstractCegarLoop]: Abstraction has 4886 states and 5796 transitions. [2022-12-14 14:51:04,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4886 states and 5796 transitions. [2022-12-14 14:51:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:51:04,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:04,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:04,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 14:51:04,044 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:51:04,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1849430037, now seen corresponding path program 1 times [2022-12-14 14:51:04,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:04,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507731861] [2022-12-14 14:51:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:51:28,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:28,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507731861] [2022-12-14 14:51:28,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507731861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:28,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:28,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 14:51:28,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994452001] [2022-12-14 14:51:28,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:28,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 14:51:28,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:28,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 14:51:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 14:51:28,837 INFO L87 Difference]: Start difference. First operand 4886 states and 5796 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:55,956 INFO L93 Difference]: Finished difference Result 5341 states and 6325 transitions. [2022-12-14 14:51:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 14:51:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2022-12-14 14:51:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:55,961 INFO L225 Difference]: With dead ends: 5341 [2022-12-14 14:51:55,961 INFO L226 Difference]: Without dead ends: 5021 [2022-12-14 14:51:55,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=1355, Invalid=6301, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 14:51:55,962 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 1945 mSDsluCounter, 3546 mSDsCounter, 0 mSdLazyCounter, 4146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1945 SdHoareTripleChecker+Valid, 3841 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:55,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1945 Valid, 3841 Invalid, 4153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4146 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-12-14 14:51:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2022-12-14 14:51:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 4885. [2022-12-14 14:51:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4885 states, 4884 states have (on average 1.1861179361179361) internal successors, (5793), 4884 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4885 states to 4885 states and 5793 transitions. [2022-12-14 14:51:57,269 INFO L78 Accepts]: Start accepts. Automaton has 4885 states and 5793 transitions. Word has length 137 [2022-12-14 14:51:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:57,269 INFO L495 AbstractCegarLoop]: Abstraction has 4885 states and 5793 transitions. [2022-12-14 14:51:57,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4885 states and 5793 transitions. [2022-12-14 14:51:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:51:57,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:57,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:57,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 14:51:57,271 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:51:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash 141058265, now seen corresponding path program 1 times [2022-12-14 14:51:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:57,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088862705] [2022-12-14 14:51:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:57,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:13,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:13,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088862705] [2022-12-14 14:52:13,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088862705] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:13,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:13,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-12-14 14:52:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723672063] [2022-12-14 14:52:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 14:52:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 14:52:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1612, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 14:52:13,780 INFO L87 Difference]: Start difference. First operand 4885 states and 5793 transitions. Second operand has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:34,309 INFO L93 Difference]: Finished difference Result 5534 states and 6593 transitions. [2022-12-14 14:52:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 14:52:34,310 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 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 137 [2022-12-14 14:52:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:34,313 INFO L225 Difference]: With dead ends: 5534 [2022-12-14 14:52:34,314 INFO L226 Difference]: Without dead ends: 4879 [2022-12-14 14:52:34,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1259, Invalid=5061, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 14:52:34,315 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 1231 mSDsluCounter, 4010 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 4292 SdHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:34,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1231 Valid, 4292 Invalid, 3879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-12-14 14:52:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-12-14 14:52:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4869. [2022-12-14 14:52:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4869 states, 4868 states have (on average 1.1863188167625307) internal successors, (5775), 4868 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 5775 transitions. [2022-12-14 14:52:35,663 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 5775 transitions. Word has length 137 [2022-12-14 14:52:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:35,663 INFO L495 AbstractCegarLoop]: Abstraction has 4869 states and 5775 transitions. [2022-12-14 14:52:35,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 5775 transitions. [2022-12-14 14:52:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:52:35,664 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:35,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:35,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 14:52:35,665 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1950929926, now seen corresponding path program 1 times [2022-12-14 14:52:35,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:35,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613109610] [2022-12-14 14:52:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:35,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:47,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:47,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613109610] [2022-12-14 14:52:47,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613109610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:47,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:47,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-12-14 14:52:47,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625408557] [2022-12-14 14:52:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:47,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 14:52:47,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 14:52:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 14:52:47,638 INFO L87 Difference]: Start difference. First operand 4869 states and 5775 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:53:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:00,947 INFO L93 Difference]: Finished difference Result 6923 states and 8389 transitions. [2022-12-14 14:53:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 14:53:00,948 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 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 137 [2022-12-14 14:53:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:00,952 INFO L225 Difference]: With dead ends: 6923 [2022-12-14 14:53:00,952 INFO L226 Difference]: Without dead ends: 5772 [2022-12-14 14:53:00,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=750, Invalid=4652, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 14:53:00,954 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1133 mSDsluCounter, 5296 mSDsCounter, 0 mSdLazyCounter, 4757 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 5650 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:00,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 5650 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4757 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-14 14:53:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2022-12-14 14:53:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 5216. [2022-12-14 14:53:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5216 states, 5215 states have (on average 1.1913710450623203) internal successors, (6213), 5215 states have internal predecessors, (6213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:53:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6213 transitions. [2022-12-14 14:53:02,414 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6213 transitions. Word has length 137 [2022-12-14 14:53:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:02,414 INFO L495 AbstractCegarLoop]: Abstraction has 5216 states and 6213 transitions. [2022-12-14 14:53:02,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:53:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6213 transitions. [2022-12-14 14:53:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:53:02,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:02,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:53:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 14:53:02,416 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash 881617431, now seen corresponding path program 1 times [2022-12-14 14:53:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:02,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074072464] [2022-12-14 14:53:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:02,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:53:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:53:16,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:53:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074072464] [2022-12-14 14:53:16,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074072464] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:53:16,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:53:16,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 14:53:16,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568499020] [2022-12-14 14:53:16,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:53:16,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 14:53:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:53:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 14:53:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1783, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 14:53:16,230 INFO L87 Difference]: Start difference. First operand 5216 states and 6213 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:53:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:53:31,275 INFO L93 Difference]: Finished difference Result 6043 states and 7198 transitions. [2022-12-14 14:53:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 14:53:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 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 137 [2022-12-14 14:53:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:53:31,279 INFO L225 Difference]: With dead ends: 6043 [2022-12-14 14:53:31,279 INFO L226 Difference]: Without dead ends: 5310 [2022-12-14 14:53:31,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1323, Invalid=5483, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 14:53:31,281 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 1500 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1500 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:53:31,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1500 Valid, 2370 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 14:53:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2022-12-14 14:53:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 5215. [2022-12-14 14:53:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5215 states, 5214 states have (on average 1.1908323743766782) internal successors, (6209), 5214 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:53:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 6209 transitions. [2022-12-14 14:53:32,801 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 6209 transitions. Word has length 137 [2022-12-14 14:53:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:53:32,801 INFO L495 AbstractCegarLoop]: Abstraction has 5215 states and 6209 transitions. [2022-12-14 14:53:32,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:53:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 6209 transitions. [2022-12-14 14:53:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:53:32,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:53:32,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:53:32,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 14:53:32,803 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:53:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:53:32,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1840999449, now seen corresponding path program 1 times [2022-12-14 14:53:32,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:53:32,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407125526] [2022-12-14 14:53:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:53:32,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:53:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:54:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:54:00,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:54:00,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407125526] [2022-12-14 14:54:00,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407125526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:54:00,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:54:00,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-12-14 14:54:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092472944] [2022-12-14 14:54:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:54:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 14:54:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:54:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 14:54:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 14:54:00,513 INFO L87 Difference]: Start difference. First operand 5215 states and 6209 transitions. Second operand has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:54:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:54:18,142 INFO L93 Difference]: Finished difference Result 5790 states and 6899 transitions. [2022-12-14 14:54:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 14:54:18,142 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 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 137 [2022-12-14 14:54:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:54:18,146 INFO L225 Difference]: With dead ends: 5790 [2022-12-14 14:54:18,146 INFO L226 Difference]: Without dead ends: 5444 [2022-12-14 14:54:18,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1211, Invalid=4795, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 14:54:18,148 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 1136 mSDsluCounter, 4128 mSDsCounter, 0 mSdLazyCounter, 4688 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 4439 SdHoareTripleChecker+Invalid, 4702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:54:18,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1136 Valid, 4439 Invalid, 4702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4688 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-12-14 14:54:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2022-12-14 14:54:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 5214. [2022-12-14 14:54:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5214 states, 5213 states have (on average 1.190485325148667) internal successors, (6206), 5213 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:54:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 6206 transitions. [2022-12-14 14:54:19,676 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 6206 transitions. Word has length 137 [2022-12-14 14:54:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:54:19,676 INFO L495 AbstractCegarLoop]: Abstraction has 5214 states and 6206 transitions. [2022-12-14 14:54:19,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:54:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 6206 transitions. [2022-12-14 14:54:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 14:54:19,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:54:19,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:54:19,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 14:54:19,678 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:54:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:54:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1382176367, now seen corresponding path program 1 times [2022-12-14 14:54:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:54:19,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634335428] [2022-12-14 14:54:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:54:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:54:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:54:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:54:19,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:54:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634335428] [2022-12-14 14:54:19,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634335428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:54:19,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:54:19,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:54:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880570881] [2022-12-14 14:54:19,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:54:19,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:54:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:54:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:54:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:54:19,724 INFO L87 Difference]: Start difference. First operand 5214 states and 6206 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) 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) [2022-12-14 14:54:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:54:21,670 INFO L93 Difference]: Finished difference Result 9332 states and 11494 transitions. [2022-12-14 14:54:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:54:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) 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 139 [2022-12-14 14:54:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:54:21,674 INFO L225 Difference]: With dead ends: 9332 [2022-12-14 14:54:21,674 INFO L226 Difference]: Without dead ends: 5400 [2022-12-14 14:54:21,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:54:21,677 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 60 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:54:21,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 437 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:54:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-12-14 14:54:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 4750. [2022-12-14 14:54:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4749 states have (on average 1.169930511686671) internal successors, (5556), 4749 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:54:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 5556 transitions. [2022-12-14 14:54:23,113 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 5556 transitions. Word has length 139 [2022-12-14 14:54:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:54:23,114 INFO L495 AbstractCegarLoop]: Abstraction has 4750 states and 5556 transitions. [2022-12-14 14:54:23,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) 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) [2022-12-14 14:54:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 5556 transitions. [2022-12-14 14:54:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 14:54:23,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:54:23,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:54:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 14:54:23,115 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:54:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:54:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash -329143870, now seen corresponding path program 1 times [2022-12-14 14:54:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:54:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589658645] [2022-12-14 14:54:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:54:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:54:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:54:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:54:48,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:54:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589658645] [2022-12-14 14:54:48,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589658645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:54:48,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:54:48,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 14:54:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24766219] [2022-12-14 14:54:48,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:54:48,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 14:54:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:54:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 14:54:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1941, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 14:54:48,247 INFO L87 Difference]: Start difference. First operand 4750 states and 5556 transitions. Second operand has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:55:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:55:14,316 INFO L93 Difference]: Finished difference Result 5980 states and 7068 transitions. [2022-12-14 14:55:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 14:55:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 14:55:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:55:14,321 INFO L225 Difference]: With dead ends: 5980 [2022-12-14 14:55:14,321 INFO L226 Difference]: Without dead ends: 5092 [2022-12-14 14:55:14,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=993, Invalid=5649, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 14:55:14,323 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1278 mSDsluCounter, 3616 mSDsCounter, 0 mSdLazyCounter, 4329 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 3869 SdHoareTripleChecker+Invalid, 4334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:55:14,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1278 Valid, 3869 Invalid, 4334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4329 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-12-14 14:55:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5092 states. [2022-12-14 14:55:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5092 to 4479. [2022-12-14 14:55:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4479 states, 4478 states have (on average 1.168825368468066) internal successors, (5234), 4478 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:55:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4479 states to 4479 states and 5234 transitions. [2022-12-14 14:55:15,700 INFO L78 Accepts]: Start accepts. Automaton has 4479 states and 5234 transitions. Word has length 143 [2022-12-14 14:55:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:55:15,700 INFO L495 AbstractCegarLoop]: Abstraction has 4479 states and 5234 transitions. [2022-12-14 14:55:15,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:55:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4479 states and 5234 transitions. [2022-12-14 14:55:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 14:55:15,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:55:15,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:55:15,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 14:55:15,702 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:55:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:55:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash -592108247, now seen corresponding path program 1 times [2022-12-14 14:55:15,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:55:15,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912840275] [2022-12-14 14:55:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:55:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:55:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:55:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:55:37,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:55:37,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912840275] [2022-12-14 14:55:37,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912840275] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:55:37,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:55:37,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 14:55:37,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607537093] [2022-12-14 14:55:37,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:55:37,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 14:55:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:55:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 14:55:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 14:55:37,511 INFO L87 Difference]: Start difference. First operand 4479 states and 5234 transitions. Second operand has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:55:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:55:56,123 INFO L93 Difference]: Finished difference Result 4963 states and 5802 transitions. [2022-12-14 14:55:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 14:55:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 14:55:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:55:56,127 INFO L225 Difference]: With dead ends: 4963 [2022-12-14 14:55:56,128 INFO L226 Difference]: Without dead ends: 4488 [2022-12-14 14:55:56,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=1355, Invalid=5955, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 14:55:56,129 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 1447 mSDsluCounter, 3474 mSDsCounter, 0 mSdLazyCounter, 4162 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 4172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:55:56,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1447 Valid, 3723 Invalid, 4172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 4162 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-12-14 14:55:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4488 states. [2022-12-14 14:55:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4488 to 4478. [2022-12-14 14:55:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 1.168416350234532) internal successors, (5231), 4477 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:55:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 5231 transitions. [2022-12-14 14:55:57,506 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 5231 transitions. Word has length 143 [2022-12-14 14:55:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:55:57,506 INFO L495 AbstractCegarLoop]: Abstraction has 4478 states and 5231 transitions. [2022-12-14 14:55:57,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:55:57,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 5231 transitions. [2022-12-14 14:55:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 14:55:57,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:55:57,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:55:57,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 14:55:57,508 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:55:57,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:55:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1337112958, now seen corresponding path program 1 times [2022-12-14 14:55:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:55:57,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123481979] [2022-12-14 14:55:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:55:57,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:55:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:56:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:56:09,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:56:09,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123481979] [2022-12-14 14:56:09,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123481979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:56:09,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:56:09,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-12-14 14:56:09,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212634179] [2022-12-14 14:56:09,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:56:09,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 14:56:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:56:09,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 14:56:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 14:56:09,305 INFO L87 Difference]: Start difference. First operand 4478 states and 5231 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:56:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:56:24,177 INFO L93 Difference]: Finished difference Result 5669 states and 6693 transitions. [2022-12-14 14:56:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 14:56:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 14:56:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:56:24,182 INFO L225 Difference]: With dead ends: 5669 [2022-12-14 14:56:24,182 INFO L226 Difference]: Without dead ends: 4777 [2022-12-14 14:56:24,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=985, Invalid=5987, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 14:56:24,183 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1604 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 3540 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:56:24,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1604 Valid, 3355 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3540 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 14:56:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2022-12-14 14:56:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4203. [2022-12-14 14:56:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 4202 states have (on average 1.1673012851023323) internal successors, (4905), 4202 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:56:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 4905 transitions. [2022-12-14 14:56:25,485 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 4905 transitions. Word has length 143 [2022-12-14 14:56:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:56:25,485 INFO L495 AbstractCegarLoop]: Abstraction has 4203 states and 4905 transitions. [2022-12-14 14:56:25,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:56:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 4905 transitions. [2022-12-14 14:56:25,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 14:56:25,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:56:25,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:56:25,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 14:56:25,487 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:56:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:56:25,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1082081028, now seen corresponding path program 1 times [2022-12-14 14:56:25,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:56:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941922590] [2022-12-14 14:56:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:56:25,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:56:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:56:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:56:34,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:56:34,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941922590] [2022-12-14 14:56:34,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941922590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:56:34,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:56:34,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 14:56:34,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082417155] [2022-12-14 14:56:34,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:56:34,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 14:56:34,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:56:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 14:56:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1800, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 14:56:34,931 INFO L87 Difference]: Start difference. First operand 4203 states and 4905 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:56:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:56:47,620 INFO L93 Difference]: Finished difference Result 4933 states and 5806 transitions. [2022-12-14 14:56:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 14:56:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 14:56:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:56:47,624 INFO L225 Difference]: With dead ends: 4933 [2022-12-14 14:56:47,624 INFO L226 Difference]: Without dead ends: 4449 [2022-12-14 14:56:47,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1033, Invalid=5939, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 14:56:47,626 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1236 mSDsluCounter, 3021 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 3264 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:56:47,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 3264 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3385 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 14:56:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4449 states. [2022-12-14 14:56:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4449 to 3917. [2022-12-14 14:56:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 1.1680286006128702) internal successors, (4574), 3916 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:56:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 4574 transitions. [2022-12-14 14:56:49,044 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 4574 transitions. Word has length 143 [2022-12-14 14:56:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:56:49,044 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 4574 transitions. [2022-12-14 14:56:49,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:56:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 4574 transitions. [2022-12-14 14:56:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 14:56:49,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:56:49,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:56:49,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 14:56:49,046 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:56:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:56:49,046 INFO L85 PathProgramCache]: Analyzing trace with hash -885599104, now seen corresponding path program 1 times [2022-12-14 14:56:49,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:56:49,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259056403] [2022-12-14 14:56:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:56:49,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:56:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:56:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:56:59,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:56:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259056403] [2022-12-14 14:56:59,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259056403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:56:59,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:56:59,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-12-14 14:56:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710719044] [2022-12-14 14:56:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:56:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 14:56:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:56:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 14:56:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1941, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 14:56:59,830 INFO L87 Difference]: Start difference. First operand 3917 states and 4574 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:57:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:57:14,501 INFO L93 Difference]: Finished difference Result 5021 states and 5931 transitions. [2022-12-14 14:57:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 14:57:14,502 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 14:57:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:57:14,505 INFO L225 Difference]: With dead ends: 5021 [2022-12-14 14:57:14,505 INFO L226 Difference]: Without dead ends: 4151 [2022-12-14 14:57:14,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=927, Invalid=5879, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 14:57:14,506 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1093 mSDsluCounter, 3868 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 4144 SdHoareTripleChecker+Invalid, 4459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:57:14,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 4144 Invalid, 4459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4452 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-14 14:57:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2022-12-14 14:57:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3655. [2022-12-14 14:57:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3654 states have (on average 1.1652983032293378) internal successors, (4258), 3654 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:57:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 4258 transitions. [2022-12-14 14:57:15,632 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 4258 transitions. Word has length 143 [2022-12-14 14:57:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:57:15,632 INFO L495 AbstractCegarLoop]: Abstraction has 3655 states and 4258 transitions. [2022-12-14 14:57:15,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:57:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 4258 transitions. [2022-12-14 14:57:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 14:57:15,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:57:15,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:57:15,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-14 14:57:15,633 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:57:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:57:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2078280255, now seen corresponding path program 1 times [2022-12-14 14:57:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:57:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885061248] [2022-12-14 14:57:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:57:15,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:57:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat