./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/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_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/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_50c75a8b-82ee-4c62-b990-b6c5ff75d292/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 8e8985b7b99a6dec53be0ba16cc0e7b241934830d919fef1f601cc1b51084525 --- 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 15:08:08,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:08:08,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:08:08,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:08:08,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:08:08,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:08:08,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:08:08,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:08:08,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:08:08,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:08:08,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:08:08,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:08:08,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:08:08,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:08:08,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:08:08,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:08:08,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:08:08,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:08:08,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:08:08,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:08:08,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:08:08,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:08:08,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:08:08,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:08:08,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:08:08,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:08:08,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:08:08,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:08:08,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:08:08,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:08:08,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:08:08,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:08:08,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:08:08,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:08:08,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:08:08,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:08:08,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:08:08,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:08:08,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:08:08,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:08:08,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:08:08,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:08:08,318 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:08:08,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:08:08,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:08:08,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:08:08,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:08:08,319 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:08:08,319 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:08:08,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:08:08,320 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:08:08,320 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:08:08,320 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:08:08,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:08:08,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:08:08,320 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:08:08,320 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:08:08,320 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:08:08,321 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:08:08,321 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:08:08,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:08:08,321 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:08:08,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:08:08,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:08:08,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:08:08,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:08:08,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:08:08,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:08:08,323 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:08:08,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:08:08,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:08:08,323 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:08:08,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:08:08,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:08:08,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:08:08,323 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_50c75a8b-82ee-4c62-b990-b6c5ff75d292/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e8985b7b99a6dec53be0ba16cc0e7b241934830d919fef1f601cc1b51084525 [2022-12-14 15:08:08,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:08:08,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:08:08,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:08:08,537 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:08:08,537 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:08:08,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-12-14 15:08:11,179 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:08:11,344 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:08:11,344 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-12-14 15:08:11,352 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/data/e94799c92/f262ade88079441e9b4ea65f3abb43c5/FLAG27e3b6193 [2022-12-14 15:08:11,363 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/data/e94799c92/f262ade88079441e9b4ea65f3abb43c5 [2022-12-14 15:08:11,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:08:11,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:08:11,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:08:11,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:08:11,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:08:11,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a9ed96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11, skipping insertion in model container [2022-12-14 15:08:11,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:08:11,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:08:11,562 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_50c75a8b-82ee-4c62-b990-b6c5ff75d292/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4900,4913] [2022-12-14 15:08:11,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:08:11,597 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:08:11,629 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_50c75a8b-82ee-4c62-b990-b6c5ff75d292/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4900,4913] [2022-12-14 15:08:11,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:08:11,655 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:08:11,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11 WrapperNode [2022-12-14 15:08:11,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:08:11,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:08:11,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:08:11,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:08:11,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,694 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 342 [2022-12-14 15:08:11,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:08:11,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:08:11,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:08:11,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:08:11,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,719 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:08:11,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:08:11,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:08:11,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:08:11,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (1/1) ... [2022-12-14 15:08:11,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:08:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:11,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:08:11,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:08:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:08:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:08:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:08:11,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:08:11,884 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:08:11,886 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:08:12,212 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:08:12,279 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:08:12,279 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 15:08:12,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:12 BoogieIcfgContainer [2022-12-14 15:08:12,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:08:12,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:08:12,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:08:12,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:08:12,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:08:11" (1/3) ... [2022-12-14 15:08:12,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cda64e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:12, skipping insertion in model container [2022-12-14 15:08:12,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:11" (2/3) ... [2022-12-14 15:08:12,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cda64e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:12, skipping insertion in model container [2022-12-14 15:08:12,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:12" (3/3) ... [2022-12-14 15:08:12,287 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-12-14 15:08:12,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:08:12,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:08:12,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:08:12,346 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;@3103813c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:08:12,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:08:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 60 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 15:08:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 15:08:12,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:12,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:12,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1534434526, now seen corresponding path program 1 times [2022-12-14 15:08:12,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:12,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248154087] [2022-12-14 15:08:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:12,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:12,667 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 15:08:12,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:12,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248154087] [2022-12-14 15:08:12,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248154087] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:12,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:12,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:08:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821877697] [2022-12-14 15:08:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:12,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:12,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:12,699 INFO L87 Difference]: Start difference. First operand has 61 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 60 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:08:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:12,767 INFO L93 Difference]: Finished difference Result 129 states and 199 transitions. [2022-12-14 15:08:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 15:08:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:12,777 INFO L225 Difference]: With dead ends: 129 [2022-12-14 15:08:12,777 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 15:08:12,780 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 15:08:12,782 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 67 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:12,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 174 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 15:08:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-12-14 15:08:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 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 15:08:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2022-12-14 15:08:12,814 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 38 [2022-12-14 15:08:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2022-12-14 15:08:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:08:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2022-12-14 15:08:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 15:08:12,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:12,816 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] [2022-12-14 15:08:12,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:08:12,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1513767271, now seen corresponding path program 1 times [2022-12-14 15:08:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:12,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010726544] [2022-12-14 15:08:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:12,912 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 15:08:12,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:12,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010726544] [2022-12-14 15:08:12,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010726544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:12,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:12,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:08:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582500845] [2022-12-14 15:08:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:12,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:12,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:12,915 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:08:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:12,965 INFO L93 Difference]: Finished difference Result 197 states and 277 transitions. [2022-12-14 15:08:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-12-14 15:08:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:12,968 INFO L225 Difference]: With dead ends: 197 [2022-12-14 15:08:12,968 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 15:08:12,969 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 15:08:12,970 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 40 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:12,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 140 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 15:08:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-12-14 15:08:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3880597014925373) internal successors, (186), 134 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 15:08:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 186 transitions. [2022-12-14 15:08:12,990 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 186 transitions. Word has length 41 [2022-12-14 15:08:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:12,990 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 186 transitions. [2022-12-14 15:08:12,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:08:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 186 transitions. [2022-12-14 15:08:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 15:08:12,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:12,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:12,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:08:12,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1384102545, now seen corresponding path program 1 times [2022-12-14 15:08:12,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:12,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722530215] [2022-12-14 15:08:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:12,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:13,050 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 15:08:13,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:13,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722530215] [2022-12-14 15:08:13,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722530215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:13,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:13,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:08:13,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309627404] [2022-12-14 15:08:13,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:13,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:13,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:13,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:13,052 INFO L87 Difference]: Start difference. First operand 135 states and 186 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:08:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:13,105 INFO L93 Difference]: Finished difference Result 339 states and 484 transitions. [2022-12-14 15:08:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 15:08:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:13,109 INFO L225 Difference]: With dead ends: 339 [2022-12-14 15:08:13,109 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 15:08:13,110 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 15:08:13,112 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 35 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:13,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 136 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 15:08:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2022-12-14 15:08:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.407079646017699) internal successors, (318), 226 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 15:08:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 318 transitions. [2022-12-14 15:08:13,139 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 318 transitions. Word has length 44 [2022-12-14 15:08:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:13,139 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 318 transitions. [2022-12-14 15:08:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:08:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 318 transitions. [2022-12-14 15:08:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:08:13,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:13,140 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] [2022-12-14 15:08:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:08:13,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2106560249, now seen corresponding path program 1 times [2022-12-14 15:08:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920385938] [2022-12-14 15:08:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:13,190 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 15:08:13,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920385938] [2022-12-14 15:08:13,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920385938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:13,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:13,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:08:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063952666] [2022-12-14 15:08:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:13,193 INFO L87 Difference]: Start difference. First operand 227 states and 318 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:08:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:13,264 INFO L93 Difference]: Finished difference Result 599 states and 856 transitions. [2022-12-14 15:08:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-12-14 15:08:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:13,268 INFO L225 Difference]: With dead ends: 599 [2022-12-14 15:08:13,268 INFO L226 Difference]: Without dead ends: 397 [2022-12-14 15:08:13,270 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 15:08:13,271 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 30 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:13,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 132 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-12-14 15:08:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2022-12-14 15:08:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.4060913705583757) internal successors, (554), 394 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 15:08:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2022-12-14 15:08:13,332 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 47 [2022-12-14 15:08:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:13,332 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2022-12-14 15:08:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:08:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2022-12-14 15:08:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 15:08:13,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:13,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:13,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:08:13,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1318268341, now seen corresponding path program 1 times [2022-12-14 15:08:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399699346] [2022-12-14 15:08:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:13,435 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 15:08:13,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:13,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399699346] [2022-12-14 15:08:13,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399699346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:13,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:13,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:08:13,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846021479] [2022-12-14 15:08:13,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:13,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:08:13,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:08:13,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:08:13,438 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:08:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:13,732 INFO L93 Difference]: Finished difference Result 1605 states and 2279 transitions. [2022-12-14 15:08:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:08:13,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 15:08:13,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:13,740 INFO L225 Difference]: With dead ends: 1605 [2022-12-14 15:08:13,740 INFO L226 Difference]: Without dead ends: 1235 [2022-12-14 15:08:13,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:08:13,741 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 357 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:13,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 731 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:08:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-12-14 15:08:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 567. [2022-12-14 15:08:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3939929328621907) internal successors, (789), 566 states have internal predecessors, (789), 0 states have call successors, (0), 0 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 15:08:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 789 transitions. [2022-12-14 15:08:13,802 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 789 transitions. Word has length 50 [2022-12-14 15:08:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:13,803 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 789 transitions. [2022-12-14 15:08:13,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:08:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 789 transitions. [2022-12-14 15:08:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 15:08:13,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:13,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:13,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:08:13,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:13,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1081298735, now seen corresponding path program 1 times [2022-12-14 15:08:13,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:13,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890046063] [2022-12-14 15:08:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:13,856 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 15:08:13,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:13,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890046063] [2022-12-14 15:08:13,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890046063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:13,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:13,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:08:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994438779] [2022-12-14 15:08:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:13,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:13,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:08:13,858 INFO L87 Difference]: Start difference. First operand 567 states and 789 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 15:08:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:13,962 INFO L93 Difference]: Finished difference Result 1437 states and 2027 transitions. [2022-12-14 15:08:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-12-14 15:08:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:13,965 INFO L225 Difference]: With dead ends: 1437 [2022-12-14 15:08:13,965 INFO L226 Difference]: Without dead ends: 895 [2022-12-14 15:08:13,966 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 15:08:13,967 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:13,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 108 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-12-14 15:08:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2022-12-14 15:08:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.404708520179372) internal successors, (1253), 892 states have internal predecessors, (1253), 0 states have call successors, (0), 0 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 15:08:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1253 transitions. [2022-12-14 15:08:14,054 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1253 transitions. Word has length 52 [2022-12-14 15:08:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:14,055 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1253 transitions. [2022-12-14 15:08:14,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 15:08:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1253 transitions. [2022-12-14 15:08:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 15:08:14,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:14,056 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] [2022-12-14 15:08:14,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:08:14,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1060296080, now seen corresponding path program 1 times [2022-12-14 15:08:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:14,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626829555] [2022-12-14 15:08:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:14,260 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 15:08:14,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:14,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626829555] [2022-12-14 15:08:14,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626829555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:14,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:14,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:08:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106598861] [2022-12-14 15:08:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:08:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:08:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:08:14,262 INFO L87 Difference]: Start difference. First operand 893 states and 1253 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 15:08:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:14,433 INFO L93 Difference]: Finished difference Result 1761 states and 2480 transitions. [2022-12-14 15:08:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:08:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-12-14 15:08:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:14,437 INFO L225 Difference]: With dead ends: 1761 [2022-12-14 15:08:14,437 INFO L226 Difference]: Without dead ends: 895 [2022-12-14 15:08:14,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:08:14,438 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 88 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:14,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 202 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-12-14 15:08:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2022-12-14 15:08:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.4024663677130045) internal successors, (1251), 892 states have internal predecessors, (1251), 0 states have call successors, (0), 0 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 15:08:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1251 transitions. [2022-12-14 15:08:14,511 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1251 transitions. Word has length 52 [2022-12-14 15:08:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:14,511 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1251 transitions. [2022-12-14 15:08:14,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 15:08:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1251 transitions. [2022-12-14 15:08:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 15:08:14,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:14,512 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] [2022-12-14 15:08:14,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:08:14,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1488650496, now seen corresponding path program 1 times [2022-12-14 15:08:14,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:14,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132861088] [2022-12-14 15:08:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:14,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:08:14,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132861088] [2022-12-14 15:08:14,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132861088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:14,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:14,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:08:14,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761071601] [2022-12-14 15:08:14,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:14,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:08:14,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:14,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:08:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:08:14,585 INFO L87 Difference]: Start difference. First operand 893 states and 1251 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:14,724 INFO L93 Difference]: Finished difference Result 1759 states and 2475 transitions. [2022-12-14 15:08:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:08:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 15:08:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:14,730 INFO L225 Difference]: With dead ends: 1759 [2022-12-14 15:08:14,730 INFO L226 Difference]: Without dead ends: 893 [2022-12-14 15:08:14,732 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 15:08:14,732 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 156 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:14,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 62 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-12-14 15:08:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-12-14 15:08:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3845291479820627) internal successors, (1235), 892 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 15:08:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1235 transitions. [2022-12-14 15:08:14,827 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1235 transitions. Word has length 53 [2022-12-14 15:08:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:14,828 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1235 transitions. [2022-12-14 15:08:14,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1235 transitions. [2022-12-14 15:08:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 15:08:14,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:14,828 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] [2022-12-14 15:08:14,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:08:14,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:14,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1940784411, now seen corresponding path program 1 times [2022-12-14 15:08:14,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:14,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828192790] [2022-12-14 15:08:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:14,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:14,879 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 15:08:14,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828192790] [2022-12-14 15:08:14,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828192790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:14,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:14,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:08:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538393371] [2022-12-14 15:08:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:14,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:08:14,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:08:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:08:14,882 INFO L87 Difference]: Start difference. First operand 893 states and 1235 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:15,018 INFO L93 Difference]: Finished difference Result 1759 states and 2443 transitions. [2022-12-14 15:08:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:08:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 15:08:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:15,021 INFO L225 Difference]: With dead ends: 1759 [2022-12-14 15:08:15,021 INFO L226 Difference]: Without dead ends: 893 [2022-12-14 15:08:15,022 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 15:08:15,023 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 179 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:15,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-12-14 15:08:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-12-14 15:08:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3486547085201794) internal successors, (1203), 892 states have internal predecessors, (1203), 0 states have call successors, (0), 0 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 15:08:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1203 transitions. [2022-12-14 15:08:15,118 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1203 transitions. Word has length 53 [2022-12-14 15:08:15,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:15,118 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1203 transitions. [2022-12-14 15:08:15,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1203 transitions. [2022-12-14 15:08:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 15:08:15,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:15,118 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] [2022-12-14 15:08:15,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:08:15,119 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1591319178, now seen corresponding path program 1 times [2022-12-14 15:08:15,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:15,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428460907] [2022-12-14 15:08:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:15,171 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 15:08:15,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:15,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428460907] [2022-12-14 15:08:15,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428460907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:15,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:15,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:08:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323928696] [2022-12-14 15:08:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:15,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:08:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:08:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:08:15,173 INFO L87 Difference]: Start difference. First operand 893 states and 1203 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:15,342 INFO L93 Difference]: Finished difference Result 1759 states and 2379 transitions. [2022-12-14 15:08:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:08:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 15:08:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:15,344 INFO L225 Difference]: With dead ends: 1759 [2022-12-14 15:08:15,344 INFO L226 Difference]: Without dead ends: 893 [2022-12-14 15:08:15,345 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 15:08:15,346 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 163 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:15,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 54 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-12-14 15:08:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-12-14 15:08:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3262331838565022) internal successors, (1183), 892 states have internal predecessors, (1183), 0 states have call successors, (0), 0 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 15:08:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1183 transitions. [2022-12-14 15:08:15,472 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1183 transitions. Word has length 53 [2022-12-14 15:08:15,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:15,473 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1183 transitions. [2022-12-14 15:08:15,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1183 transitions. [2022-12-14 15:08:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 15:08:15,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:15,473 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] [2022-12-14 15:08:15,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:08:15,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:15,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:15,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1719404485, now seen corresponding path program 1 times [2022-12-14 15:08:15,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:15,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332929374] [2022-12-14 15:08:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:15,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:15,593 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 15:08:15,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:15,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332929374] [2022-12-14 15:08:15,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332929374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:15,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:08:15,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:08:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254318079] [2022-12-14 15:08:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:08:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:08:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:08:15,595 INFO L87 Difference]: Start difference. First operand 893 states and 1183 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:15,844 INFO L93 Difference]: Finished difference Result 1444 states and 1901 transitions. [2022-12-14 15:08:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:08:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 15:08:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:15,848 INFO L225 Difference]: With dead ends: 1444 [2022-12-14 15:08:15,848 INFO L226 Difference]: Without dead ends: 1442 [2022-12-14 15:08:15,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:08:15,849 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 77 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:15,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 314 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:08:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-12-14 15:08:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 925. [2022-12-14 15:08:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 1.2889610389610389) internal successors, (1191), 924 states have internal predecessors, (1191), 0 states have call successors, (0), 0 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 15:08:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1191 transitions. [2022-12-14 15:08:15,998 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1191 transitions. Word has length 53 [2022-12-14 15:08:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:15,998 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1191 transitions. [2022-12-14 15:08:15,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 15:08:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1191 transitions. [2022-12-14 15:08:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 15:08:15,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:15,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:15,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:08:15,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:15,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1767720497, now seen corresponding path program 1 times [2022-12-14 15:08:15,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:16,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509119583] [2022-12-14 15:08:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:16,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:08:19,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509119583] [2022-12-14 15:08:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509119583] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:19,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169914368] [2022-12-14 15:08:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:19,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:19,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:19,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:19,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50c75a8b-82ee-4c62-b990-b6c5ff75d292/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:08:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:19,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 15:08:19,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:08:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates...